Code modernize ...

* replace 0/NULL with nullptr [using clang-tidy]

20 files changed, 329 insertions, 328 deletions

diff --git a/protocols/Gadu-Gadu/src/avatar.cpp b/protocols/Gadu-Gadu/src/avatar.cpp
index 24ac5b6e68..975d3720b4 100644
--- a/protocols/Gadu-Gadu/src/avatar.cpp
+++ b/protocols/Gadu-Gadu/src/avatar.cpp
@@ -58,7 +58,7 @@ void GGPROTO::getAvatarFilename(MCONTACT hContact, wchar_t *pszDest, int cbLen)
 

 bool GGPROTO::getAvatarFileInfo(uin_t uin, char **avatarurl, char **avatarts)

 {

-	*avatarurl = *avatarts = NULL;

+	*avatarurl = *avatarts = nullptr;

 

 	char szUrl[128];

 	mir_snprintf(szUrl, "http://api.gadu-gadu.pl/avatars/%d/0.xml", uin);

@@ -69,7 +69,7 @@ bool GGPROTO::getAvatarFileInfo(uin_t uin, char **avatarurl, char **avatarts)
 	req.flags = NLHRF_NODUMP | NLHRF_HTTP11 | NLHRF_REDIRECT;

 

 	NETLIBHTTPREQUEST *resp = Netlib_HttpTransaction(m_hNetlibUser, &req);

-	if (resp == NULL) {

+	if (resp == nullptr) {

 		debugLogA("getAvatarFileInfo(): No response from HTTP request");

 		return false;

 	}

@@ -84,18 +84,18 @@ bool GGPROTO::getAvatarFileInfo(uin_t uin, char **avatarurl, char **avatarts)
 

 		//if this url returned xml data (before and after 11.2013 gg convention)

 		wchar_t *xmlAction = mir_a2u(resp->pData);

-		HXML hXml = xmlParseString(xmlAction, 0, L"result");

-		if (hXml != NULL) {

+		HXML hXml = xmlParseString(xmlAction, nullptr, L"result");

+		if (hXml != nullptr) {

 			HXML node = xmlGetChildByPath(hXml, L"users/user/avatars/avatar", 0);

-			const wchar_t *blank = (node != NULL) ? xmlGetAttrValue(node, L"blank") : NULL;

-			if (blank != NULL && mir_wstrcmp(blank, L"1")) {

+			const wchar_t *blank = (node != nullptr) ? xmlGetAttrValue(node, L"blank") : nullptr;

+			if (blank != nullptr && mir_wstrcmp(blank, L"1")) {

 				node = xmlGetChildByPath(hXml, L"users/user/avatars/avatar/timestamp", 0);

-				*avatarts = node != NULL ? mir_u2a(xmlGetText(node)) : NULL;

+				*avatarts = node != nullptr ? mir_u2a(xmlGetText(node)) : nullptr;

 				node = xmlGetChildByPath(hXml, L"users/user/avatars/avatar/bigavatar", 0); //new gg convention

-				if (node == NULL){

+				if (node == nullptr){

 					node = xmlGetChildByPath(hXml, L"users/user/avatars/avatar/originBigAvatar", 0); //old gg convention

 				}

-				*avatarurl = node != NULL ? mir_u2a(xmlGetText(node)) : NULL;

+				*avatarurl = node != nullptr ? mir_u2a(xmlGetText(node)) : nullptr;

 			}

 			xmlDestroyNode(hXml);

 		}

@@ -133,8 +133,8 @@ char *gg_avatarhash(char *param)
 {

 	char *result;

 

-	if (param == NULL || (result = (char *)mir_alloc(MIR_SHA1_HASH_SIZE * 2 + 1)) == NULL)

-		return NULL;

+	if (param == nullptr || (result = (char *)mir_alloc(MIR_SHA1_HASH_SIZE * 2 + 1)) == nullptr)

+		return nullptr;

 

 	BYTE digest[MIR_SHA1_HASH_SIZE];

 	mir_sha1_hash((BYTE*)param, (int)mir_strlen(param), digest);

@@ -168,7 +168,7 @@ void GGPROTO::requestAvatarInfo(MCONTACT hContact, int iWaitFor)
 	if (!getByte(GG_KEY_ENABLEAVATARS, GG_KEYDEF_ENABLEAVATARS))

 		return;

 

-	GGREQUESTAVATARDATA *data = NULL;

+	GGREQUESTAVATARDATA *data = nullptr;

 	gg_EnterCriticalSection(&avatar_mutex, "requestAvatarInfo", 2, "avatar_mutex", 1);

 	if (avatar_requests.getIndex((GGREQUESTAVATARDATA*)&hContact) == -1) {

 		data = (GGREQUESTAVATARDATA*)mir_alloc(sizeof(GGREQUESTAVATARDATA));

@@ -178,7 +178,7 @@ void GGPROTO::requestAvatarInfo(MCONTACT hContact, int iWaitFor)
 	}

 	gg_LeaveCriticalSection(&avatar_mutex, "requestAvatarInfo", 2, 1, "avatar_mutex", 1);

 

-	if (data != NULL)

+	if (data != nullptr)

 		setByte(hContact, GG_KEY_AVATARREQUESTED, 1);

 }

 

@@ -202,14 +202,14 @@ void __cdecl GGPROTO::avatarrequestthread(void*)
 			char *AvatarURL, *AvatarTs;

 			if (!getAvatarFileInfo(uin, &AvatarURL, &AvatarTs)) {

 				if (iWaitFor)

-					ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_FAILED, NULL, 0);

+					ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_FAILED, nullptr, 0);

 			}

 			else {

-				if (AvatarURL == NULL && AvatarTs == NULL){

+				if (AvatarURL == nullptr && AvatarTs == nullptr){

 					delSetting(hContact, GG_KEY_AVATARURL);

 					delSetting(hContact, GG_KEY_AVATARTS);

 					if (iWaitFor)

-						ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, NULL, 0);

+						ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, nullptr, 0);

 				}

 				else {

 					setString(hContact, GG_KEY_AVATARURL, AvatarURL);

@@ -221,11 +221,11 @@ void __cdecl GGPROTO::avatarrequestthread(void*)
 						ai.hContact = hContact;

 						INT_PTR res = getavatarinfo((WPARAM)GAIF_FORCE, (LPARAM)&ai);

 						if (res == GAIR_NOAVATAR)

-							ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, NULL, 0);

+							ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, nullptr, 0);

 						else if (res == GAIR_SUCCESS)

 							ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_SUCCESS, (HANDLE)&ai, 0);

 					}

-					else ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_STATUS, 0, 0);

+					else ProtoBroadcastAck(hContact, ACKTYPE_AVATAR, ACKRESULT_STATUS, nullptr, 0);

 					delSetting(hContact, GG_KEY_AVATARREQUESTED);

 				}

 			}

@@ -314,7 +314,7 @@ void GGPROTO::initavatarrequestthread()
 #ifdef DEBUGMODE

 		debugLogA("initavatarrequestthread(): ForkThreadEx 1 GGPROTO::avatarrequestthread");

 #endif

-		pth_avatar.hThread = ForkThreadEx(&GGPROTO::avatarrequestthread, NULL, &pth_avatar.dwThreadId);

+		pth_avatar.hThread = ForkThreadEx(&GGPROTO::avatarrequestthread, nullptr, &pth_avatar.dwThreadId);

 	}

 }

 

@@ -324,7 +324,7 @@ void __cdecl GGPROTO::getOwnAvatarThread(void*)
 

 	char *AvatarURL, *AvatarTs;

 	if (getAvatarFileInfo(getDword(GG_KEY_UIN, 0), &AvatarURL, &AvatarTs)) {

-		if (AvatarURL != NULL && AvatarTs != NULL) {

+		if (AvatarURL != nullptr && AvatarTs != nullptr) {

 			setString(GG_KEY_AVATARURL, AvatarURL);

 			setString(GG_KEY_AVATARTS, AvatarTs);

 			mir_free(AvatarURL); mir_free(AvatarTs);

@@ -348,7 +348,7 @@ void GGPROTO::getOwnAvatar()
 #ifdef DEBUGMODE

 		debugLogA("getOwnAvatar(): ForkThread 2 GGPROTO::getOwnAvatarThread");

 #endif

-		ForkThread(&GGPROTO::getOwnAvatarThread, NULL);

+		ForkThread(&GGPROTO::getOwnAvatarThread, nullptr);

 	}

 }

 

diff --git a/protocols/Gadu-Gadu/src/core.cpp b/protocols/Gadu-Gadu/src/core.cpp
index 0fb92afbe2..a9048fe0c8 100644
--- a/protocols/Gadu-Gadu/src/core.cpp
+++ b/protocols/Gadu-Gadu/src/core.cpp
@@ -43,7 +43,7 @@ int GGPROTO::isonline()
 	int isonline;

 

 	gg_EnterCriticalSection(&sess_mutex, "isonline", 76, "sess_mutex", 1);

-	isonline = (sess != NULL);

+	isonline = (sess != nullptr);

 	gg_LeaveCriticalSection(&sess_mutex, "isonline", 76, 1, "sess_mutex", 1);

 

 	return isonline;

@@ -58,7 +58,7 @@ void GGPROTO::disconnect()
 	if (isonline())

 	{

 		// Fetch proper status msg

-		char *szMsg = NULL;

+		char *szMsg = nullptr;

 

 		// Loadup status

 		if (getByte(GG_KEY_LEAVESTATUSMSG, GG_KEYDEF_LEAVESTATUSMSG))

@@ -184,8 +184,8 @@ typedef struct
 int gg_decodehosts(char *var, GGHOST *hosts, int max)

 {

 	int hp = 0;

-	char *hostname = NULL;

-	char *portname = NULL;

+	char *hostname = nullptr;

+	char *portname = nullptr;

 

 	while(var && *var && hp < max)

 	{

@@ -212,8 +212,8 @@ int gg_decodehosts(char *var, GGHOST *hosts, int max)
 			hp ++;

 

 			// Zero the names

-			hostname = NULL;

-			portname = NULL;

+			hostname = nullptr;

+			portname = nullptr;

 		}

 		else

 			var ++;

@@ -294,7 +294,7 @@ void __cdecl GGPROTO::mainthread(void *)
 			gg_proxy_username = nlus.szProxyAuthUser;

 			gg_proxy_password = nlus.szProxyAuthPassword;

 		}

-		else gg_proxy_username = gg_proxy_password = NULL;

+		else gg_proxy_username = gg_proxy_password = nullptr;

 	}

 	else {

 		debugLogA("mainthread() (%x): Failed loading proxy settings.", this);

@@ -344,7 +344,7 @@ void __cdecl GGPROTO::mainthread(void *)
 	////////////////////////////// DCC STARTUP /////////////////////////////

 	// Uin is ok so startup dcc if not started already

 	if (!dcc) {

-		hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

+		hEvent = CreateEvent(nullptr, TRUE, FALSE, nullptr);

 		dccstart();

 

 		// Wait for DCC

@@ -352,7 +352,7 @@ void __cdecl GGPROTO::mainthread(void *)
 		debugLogA("mainthread() (%x): Waiting DCC service to start...", this);

 #endif

 		while (WaitForSingleObjectEx(hEvent, INFINITE, TRUE) != WAIT_OBJECT_0);

-		CloseHandle(hEvent); hEvent = NULL;

+		CloseHandle(hEvent); hEvent = nullptr;

 	}

 

 	// Check if dcc is running and setup forwarding port

@@ -379,7 +379,7 @@ retry:
 	gg_EnterCriticalSection(&modemsg_mutex, "mainthread", 13, "modemsg_mutex", 1);

 

 	p.status_descr = mir_utf8encodeW(getstatusmsg(m_iDesiredStatus));

-	p.status = status_m2gg(m_iDesiredStatus, p.status_descr != NULL);

+	p.status = status_m2gg(m_iDesiredStatus, p.status_descr != nullptr);

 

 	debugLogW(L"mainthread() (%x): Connecting with number %d, status %d and description \"%s\".", this, p.uin, m_iDesiredStatus,

 				p.status_descr ? getstatusmsg(m_iDesiredStatus) : L"<none>");

@@ -414,7 +414,7 @@ retry:
 		// Check if connection attempt wasn't cancelled by the user

 		if (m_iDesiredStatus != ID_STATUS_OFFLINE)

 		{

-			wchar_t error[128], *perror = NULL;

+			wchar_t error[128], *perror = nullptr;

 			// Lookup for error desciption

 			if (errno == EACCES) {

 				for (int i = 0; reason[i].type; i++) if (reason[i].type == gg_failno) {

@@ -438,13 +438,13 @@ retry:
 				DWORD dwInterval = getDword(GG_KEY_RECONNINTERVAL, GG_KEYDEF_RECONNINTERVAL), dwResult;

 				BOOL bRetry = TRUE;

 

-				hConnStopEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

+				hConnStopEvent = CreateEvent(nullptr, TRUE, FALSE, nullptr);

 				dwResult = WaitForSingleObjectEx(hConnStopEvent, dwInterval, TRUE);

 				if ((dwResult == WAIT_OBJECT_0 && m_iDesiredStatus == ID_STATUS_OFFLINE)

 					|| (dwResult == WAIT_IO_COMPLETION && Miranda_IsTerminated()))

 					bRetry = FALSE;

 				CloseHandle(hConnStopEvent);

-				hConnStopEvent = NULL;

+				hConnStopEvent = nullptr;

 

 				// Reconnect to the next server on the list

 				if (bRetry)

@@ -466,7 +466,7 @@ retry:
 	else

 	{

 		// Successfully connected

-		logonTime = time(NULL);

+		logonTime = time(nullptr);

 		setDword(GG_KEY_LOGONTIME, logonTime);

 		gg_EnterCriticalSection(&sess_mutex, "mainthread", 15, "sess_mutex", 1);

 		sess = local_sess;

@@ -510,7 +510,7 @@ retry:
 			debugLogA("mainthread() (%x): Connection closed.", this);

 			gg_EnterCriticalSection(&sess_mutex, "mainthread", 16, "sess_mutex", 1);

 			gg_free_session(sess);

-			sess = NULL;

+			sess = nullptr;

 			gg_LeaveCriticalSection(&sess_mutex, "mainthread", 16, 1, "sess_mutex", 1);

 			break;

 		}

@@ -533,7 +533,7 @@ retry:
 			case GG_EVENT_DISCONNECT:

 				gg_EnterCriticalSection(&sess_mutex, "mainthread", 17, "sess_mutex", 1);

 				gg_free_session(sess);

-				sess = NULL;

+				sess = nullptr;

 				gg_LeaveCriticalSection(&sess_mutex, "mainthread", 17, 1, "sess_mutex", 1);

 				break;

 

@@ -547,7 +547,7 @@ retry:
 			case GG_EVENT_ACK:

 				if (e->event.ack.seq && e->event.ack.recipient)

 				{

-					ProtoBroadcastAck(getcontact((DWORD)e->event.ack.recipient, 0, 0, NULL),

+					ProtoBroadcastAck(getcontact((DWORD)e->event.ack.recipient, 0, 0, nullptr),

 						ACKTYPE_MESSAGE, ACKRESULT_SUCCESS, (HANDLE)e->event.ack.seq, 0);

 				}

 				break;

@@ -562,7 +562,7 @@ retry:
 

 				for (; n->uin; n++)

 				{

-					wchar_t *descrT = (e->type == GG_EVENT_NOTIFY_DESCR) ? mir_utf8decodeW(e->event.notify_descr.descr) : NULL;

+					wchar_t *descrT = (e->type == GG_EVENT_NOTIFY_DESCR) ? mir_utf8decodeW(e->event.notify_descr.descr) : nullptr;

 					changecontactstatus(n->uin, n->status, descrT, 0, n->remote_ip, n->remote_port, n->version);

 					if (descrT) mir_free(descrT);

 				}

@@ -580,7 +580,7 @@ retry:
 						e->event.notify60[i].time, e->event.notify60[i].remote_ip, e->event.notify60[i].remote_port,

 						e->event.notify60[i].version);

 					mir_free(descrT);

-					requestAvatarInfo(getcontact(e->event.notify60[i].uin, 0, 0, NULL), 0);

+					requestAvatarInfo(getcontact(e->event.notify60[i].uin, 0, 0, nullptr), 0);

 				}

 				break;

 			}

@@ -628,7 +628,7 @@ retry:
 						const char *__status = gg_pubdir50_get(res, i, GG_PUBDIR50_STATUS);

 						uin_t uin = __fmnumber ? atoi(__fmnumber) : 0;

 

-						MCONTACT hContact = (res->seq == GG_SEQ_CHINFO) ? NULL : getcontact(uin, 0, 0, NULL);

+						MCONTACT hContact = (res->seq == GG_SEQ_CHINFO) ? NULL : getcontact(uin, 0, 0, nullptr);

 						debugLogA("mainthread() (%x): Search result for uin %d, seq %d.", this, uin, res->seq);

 						if (res->seq == GG_SEQ_SEARCH)

 						{

@@ -641,7 +641,7 @@ retry:
 								mir_wstrncat(strFmt2, strFmt1, _countof(strFmt2) - mir_wstrlen(strFmt2));

 							}

 							if (__birthyear) {

-								time_t t = time(NULL);

+								time_t t = time(nullptr);

 								struct tm *lt = localtime(&t);

 								int br = atoi(__birthyear);

 

@@ -704,7 +704,7 @@ retry:
 

 							if (__birthyear)

 							{

-								time_t t = time(NULL);

+								time_t t = time(nullptr);

 								struct tm *lt = localtime(&t);

 								int br = atoi(__birthyear);

 								if (br > 0)

@@ -766,7 +766,7 @@ retry:
 			// Status (version >= 6.0)

 			case GG_EVENT_STATUS60:

 				{

-					MCONTACT hContact = getcontact(e->event.status60.uin, 0, 0, NULL);

+					MCONTACT hContact = getcontact(e->event.status60.uin, 0, 0, nullptr);

 					int oldstatus = getWord(hContact, GG_KEY_STATUS, (WORD)ID_STATUS_OFFLINE);

 					uin_t uin = (uin_t)getDword(GG_KEY_UIN, 0);

 

@@ -796,15 +796,15 @@ retry:
 				case GG_USERLIST_GET_REPLY:

 					if (e->event.userlist.reply) {

 						parsecontacts(e->event.userlist.reply);

-						MessageBox(NULL, TranslateT("List import successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

+						MessageBox(nullptr, TranslateT("List import successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

 					}

 					break;

 

 				case GG_USERLIST_PUT_REPLY:

 					if (is_list_remove)

-						MessageBox(NULL, TranslateT("List remove successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

+						MessageBox(nullptr, TranslateT("List remove successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

 					else

-						MessageBox(NULL, TranslateT("List export successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

+						MessageBox(nullptr, TranslateT("List export successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

 					break;

 				}

 				break;

@@ -829,11 +829,11 @@ retry:
 							UIN2IDT(e->event.msg.sender, id);

 

 							GCEVENT gce = { m_szModuleName, chat, GC_EVENT_MESSAGE };

-							time_t t = time(NULL);

+							time_t t = time(nullptr);

 							gce.ptszUID = id;

 							wchar_t* messageT = mir_utf8decodeW(e->event.msg.message);

 							gce.ptszText = messageT;

-							gce.ptszNick = (wchar_t*) pcli->pfnGetContactDisplayName( getcontact(e->event.msg.sender, 1, 0, NULL), 0);

+							gce.ptszNick = (wchar_t*) pcli->pfnGetContactDisplayName( getcontact(e->event.msg.sender, 1, 0, nullptr), 0);

 							gce.time = (!(e->event.msg.msgclass & GG_CLASS_OFFLINE) || e->event.msg.time > (t - timeDeviation)) ? t : e->event.msg.time;

 							gce.dwFlags = GCEF_ADDTOLOG;

 							debugLogW(L"mainthread() (%x): Conference message to room %s & id %s.", this, chat, id);

@@ -845,16 +845,16 @@ retry:
 					else if (!e->event.msg.recipients_count && e->event.msg.message && *e->event.msg.message && mir_strcmp(e->event.msg.message, "\xA0\0"))

 					{

 						PROTORECVEVENT pre = {0};

-						time_t t = time(NULL);

+						time_t t = time(nullptr);

 						pre.timestamp = (!(e->event.msg.msgclass & GG_CLASS_OFFLINE) || e->event.msg.time > (t - timeDeviation)) ? t : e->event.msg.time;

 						pre.szMessage = e->event.msg.message;

-						ProtoChainRecvMsg( getcontact(e->event.msg.sender, 1, 0, NULL), &pre);

+						ProtoChainRecvMsg( getcontact(e->event.msg.sender, 1, 0, nullptr), &pre);

 					}

 

 					// RichEdit format included (image)

 					if (e->event.msg.formats_length &&

 						getByte(GG_KEY_IMGRECEIVE, GG_KEYDEF_IMGRECEIVE) &&

-						!(db_get_dw(getcontact(e->event.msg.sender, 1, 0, NULL), "Ignore", "Mask1", 0) & IGNOREEVENT_MESSAGE))

+						!(db_get_dw(getcontact(e->event.msg.sender, 1, 0, nullptr), "Ignore", "Mask1", 0) & IGNOREEVENT_MESSAGE))

 					{

 						char *formats = (char*)e->event.msg.formats;

 						int len = 0, formats_len = e->event.msg.formats_length, add_ptr;

@@ -921,7 +921,7 @@ retry:
 					dbei.eventType = EVENTTYPE_MESSAGE;

 					dbei.cbBlob = (DWORD)mir_strlen(e->event.multilogon_msg.message) + 1;

 					dbei.pBlob = (PBYTE)e->event.multilogon_msg.message;

-					db_event_add( getcontact(e->event.multilogon_msg.sender, 1, 0, NULL), &dbei);

+					db_event_add( getcontact(e->event.multilogon_msg.sender, 1, 0, nullptr), &dbei);

 				}

 				break;

 

@@ -929,7 +929,7 @@ retry:
 			case GG_EVENT_MULTILOGON_INFO:

 				{

 					list_t l;

-					int* iIndexes = NULL, i;

+					int* iIndexes = nullptr, i;

 					debugLogA("mainthread(): Concurrent sessions count: %d.", e->event.multilogon_info.count);

 					if (e->event.multilogon_info.count > 0)

 						iIndexes = (int*)mir_calloc(e->event.multilogon_info.count * sizeof(int));

@@ -949,7 +949,7 @@ retry:
 						mir_free(msess);

 					}

 					list_destroy(sessions, 0);

-					sessions = NULL;

+					sessions = nullptr;

 					for (i = 0; i < e->event.multilogon_info.count; i++)

 					{

 						gg_multilogon_session* msess = (gg_multilogon_session*)mir_alloc(sizeof(struct gg_multilogon_session));

@@ -963,7 +963,7 @@ retry:
 					sessions_updatedlg();

 					if (ServiceExists(MS_POPUP_ADDPOPUPCLASS))

 					{

-						const wchar_t* szText = time(NULL) - logonTime > 3

+						const wchar_t* szText = time(nullptr) - logonTime > 3

 							? TranslateT("You have logged in at another location")

 							: TranslateT("You are logged in at another location");

 						for (i = 0; i < e->event.multilogon_info.count; i++)

@@ -987,8 +987,8 @@ retry:
 				// Get rid of empty image

 				if (e->event.image_reply.size && e->event.image_reply.image)

 				{

-					MCONTACT hContact = getcontact(e->event.image_reply.sender, 1, 0, NULL);

-					void *img = (void *)img_loadpicture(e, 0);

+					MCONTACT hContact = getcontact(e->event.image_reply.sender, 1, 0, nullptr);

+					void *img = (void *)img_loadpicture(e, nullptr);

 

 					if (!img)

 						break;

@@ -1030,12 +1030,12 @@ retry:
 				{

 					struct gg_dcc7 *dcc7 = e->event.dcc7_new;

 					debugLogA("mainthread() (%x): Incoming direct connection.", this);

-					dcc7->contact = (void*)getcontact(dcc7->peer_uin, 0, 0, NULL);

+					dcc7->contact = (void*)getcontact(dcc7->peer_uin, 0, 0, nullptr);

 

 					// Check if user is on the list and if it is my uin

 					if (!dcc7->contact || getDword(GG_KEY_UIN, -1) != dcc7->uin) {

 						gg_dcc7_free(dcc7);

-						e->event.dcc7_new = NULL;

+						e->event.dcc7_new = nullptr;

 						break;

 					}

 

@@ -1055,14 +1055,14 @@ retry:
 					PROTORECVFILET pre = {0};

 					pre.dwFlags = PRFF_UNICODE;

 					pre.fileCount = 1;

-					pre.timestamp = time(NULL);

+					pre.timestamp = time(nullptr);

 					pre.descr.w = filenameT;

 					pre.files.w = &filenameT;

 					pre.lParam = (LPARAM)dcc7;

 					ProtoChainRecvFile((UINT_PTR)dcc7->contact, &pre);

 

 					mir_free(filenameT);

-					e->event.dcc7_new = NULL;

+					e->event.dcc7_new = nullptr;

 				}

 				break;

 

@@ -1149,26 +1149,26 @@ retry:
 

 					xmlAction = mir_a2u(e->event.xml_action.data);

 					tag = mir_a2u("events");

-					hXml = xmlParseString(xmlAction, 0, tag);

+					hXml = xmlParseString(xmlAction, nullptr, tag);

 

-					if (hXml != NULL) {

+					if (hXml != nullptr) {

 						HXML node;

 						char *type, *sender;

 						

 						mir_free(tag);

 						tag = mir_a2u("event/type");

 						node = xmlGetChildByPath(hXml, tag, 0);

-						type = node != NULL ? mir_u2a(xmlGetText(node)) : NULL;

+						type = node != nullptr ? mir_u2a(xmlGetText(node)) : nullptr;

 

 						mir_free(tag);

 						tag = mir_a2u("event/sender");

 						node = xmlGetChildByPath(hXml, tag, 0);

-						sender = node != NULL ? mir_u2a(xmlGetText(node)) : NULL;

-						debugLogA("mainthread() (%x): XML Action type: %s.", this, type != NULL ? type : "unknown");

+						sender = node != nullptr ? mir_u2a(xmlGetText(node)) : nullptr;

+						debugLogA("mainthread() (%x): XML Action type: %s.", this, type != nullptr ? type : "unknown");

 						// Avatar change notify

-						if (type != NULL && !mir_strcmp(type, "28")) {

+						if (type != nullptr && !mir_strcmp(type, "28")) {

 							debugLogA("mainthread() (%x): Client %s changed his avatar.", this, sender);

-							requestAvatarInfo(getcontact(atoi(sender), 0, 0, NULL), 0);

+							requestAvatarInfo(getcontact(atoi(sender), 0, 0, nullptr), 0);

 						}

 						mir_free(type);

 						mir_free(sender);

@@ -1181,7 +1181,7 @@ retry:
 

 			case GG_EVENT_TYPING_NOTIFICATION:

 				{

-					MCONTACT hContact = getcontact(e->event.typing_notification.uin, 0, 0, NULL);

+					MCONTACT hContact = getcontact(e->event.typing_notification.uin, 0, 0, nullptr);

 #ifdef DEBUGMODE

 					debugLogA("mainthread() (%x): Typing notification from %d (%d).", this,

 						e->event.typing_notification.uin, e->event.typing_notification.length);

@@ -1224,7 +1224,7 @@ retry:
 			mir_free(msess);

 		}

 		list_destroy(sessions, 0);

-		sessions = NULL;

+		sessions = nullptr;

 		gg_LeaveCriticalSection(&sessions_mutex, "mainthread", 23, 1, "sessions_mutex", 1);

 	}

 

@@ -1310,7 +1310,7 @@ static wchar_t* sttSettingToTchar( DBVARIANT* value )
 	case DBVT_WCHAR:

 		return mir_wstrdup(value->pwszVal);

 	}

-	return NULL;

+	return nullptr;

 }

 

 int GGPROTO::dbsettingchanged(WPARAM hContact, LPARAM lParam)

@@ -1336,7 +1336,7 @@ int GGPROTO::dbsettingchanged(WPARAM hContact, LPARAM lParam)
 	if (gc_enabled && !strcmp(cws->szModule, m_szModuleName) && !strcmp(cws->szSetting, GG_KEY_NICK)){

 

 		wchar_t* ptszVal = sttSettingToTchar(&(cws->value));

-		if(ptszVal==NULL) return 0;

+		if(ptszVal==nullptr) return 0;

 

 		// Groupchat window contact is being renamed

 		DBVARIANT dbv;

@@ -1366,7 +1366,7 @@ int GGPROTO::dbsettingchanged(WPARAM hContact, LPARAM lParam)
 		// If name changed... change nick

 		if (!strcmp(cws->szSetting, "MyHandle")){

 			wchar_t* ptszVal = sttSettingToTchar(&(cws->value));

-			if(ptszVal==NULL) return 0;

+			if(ptszVal==nullptr) return 0;

 			setWString(hContact, GG_KEY_NICK, ptszVal);

 			mir_free(ptszVal);

 		}

@@ -1471,7 +1471,7 @@ void GGPROTO::notifyall()
 	if (count == 0) {

 		if (isonline()) {

 			gg_EnterCriticalSection(&sess_mutex, "notifyall", 29, "sess_mutex", 1);

-			gg_notify_ex(sess, NULL, NULL, 0);

+			gg_notify_ex(sess, nullptr, nullptr, 0);

 			gg_LeaveCriticalSection(&sess_mutex, "notifyall", 29, 1, "sess_mutex", 1);

 		}

 		return;

@@ -1583,7 +1583,7 @@ MCONTACT GGPROTO::getcontact(uin_t uin, int create, int inlist, wchar_t *szNick)
 			gg_EnterCriticalSection(&modemsg_mutex, "getcontact", 33, "modemsg_mutex", 1);

 			wchar_t *szMsg = mir_wstrdup(getstatusmsg(m_iStatus));

 			gg_LeaveCriticalSection(&modemsg_mutex, "getcontact", 33, 1, "modemsg_mutex", 1);

-			changecontactstatus(uin, status_m2gg(m_iStatus, szMsg != NULL), szMsg, 0, 0, 0, 0);

+			changecontactstatus(uin, status_m2gg(m_iStatus, szMsg != nullptr), szMsg, 0, 0, 0, 0);

 			mir_free(szMsg);

 		}

 	}

@@ -1680,7 +1680,7 @@ void GGPROTO::changecontactstatus(uin_t uin, int status, const wchar_t *idescr,
 #ifdef DEBUGMODE

 	debugLogA("changecontactstatus(): uin=%d status=%d", uin, status);

 #endif

-	MCONTACT hContact = getcontact(uin, 0, 0, NULL);

+	MCONTACT hContact = getcontact(uin, 0, 0, nullptr);

 

 	// Check if contact is on list

 	if (!hContact) return;

diff --git a/protocols/Gadu-Gadu/src/dialogs.cpp b/protocols/Gadu-Gadu/src/dialogs.cpp
index 1abf79e361..ad35aeb2de 100644
--- a/protocols/Gadu-Gadu/src/dialogs.cpp
+++ b/protocols/Gadu-Gadu/src/dialogs.cpp
@@ -39,12 +39,12 @@ static void SetValue(HWND hwndDlg, int idCtrl, MCONTACT hContact, char *szModule
 {
 	DBVARIANT dbv = {0};
 	wchar_t str[256];
-	wchar_t *ptstr = NULL;
-	wchar_t* valT = NULL;
+	wchar_t *ptstr = nullptr;
+	wchar_t* valT = nullptr;
 	int unspecified = 0;
 
 	dbv.type = DBVT_DELETED;
-	if (szModule == NULL) unspecified = 1;
+	if (szModule == nullptr) unspecified = 1;
 	else unspecified = db_get(hContact, szModule, szSetting, &dbv);
 	if (!unspecified) {
 		switch (dbv.type) {
@@ -75,7 +75,7 @@ static void SetValue(HWND hwndDlg, int idCtrl, MCONTACT hContact, char *szModule
 		case DBVT_WORD:
 			if (special == SVS_COUNTRY) {
 				char* pstr = (char*)CallService(MS_UTILS_GETCOUNTRYBYNUMBER, dbv.wVal, 0);
-				if (pstr == NULL){
+				if (pstr == nullptr){
 					unspecified = 1;
 				} else {
 					ptstr = str;
@@ -93,7 +93,7 @@ static void SetValue(HWND hwndDlg, int idCtrl, MCONTACT hContact, char *szModule
 				struct in_addr ia;
 				ia.S_un.S_addr = htonl(dbv.dVal);
 				char* pstr = inet_ntoa(ia);
-				if (pstr == NULL){
+				if (pstr == nullptr){
 					unspecified = 1;
 				} else {
 					ptstr = str;
@@ -309,9 +309,9 @@ static INT_PTR CALLBACK gg_genoptsdlgproc(HWND hwndDlg, UINT msg, WPARAM wParam,
 				uin = atoi(email);
 				GetDlgItemTextA(hwndDlg, IDC_EMAIL, email, _countof(email));
 				if (!mir_strlen(email))
-					MessageBox(NULL, TranslateT("You need to specify your registration e-mail first."),
+					MessageBox(nullptr, TranslateT("You need to specify your registration e-mail first."),
 					gg->m_tszUserName, MB_OK | MB_ICONEXCLAMATION);
-				else if (MessageBox(NULL,
+				else if (MessageBox(nullptr,
 					TranslateT("Your password will be sent to your registration e-mail.\nDo you want to continue?"),
 					gg->m_tszUserName,
 					MB_OKCANCEL | MB_ICONQUESTION) == IDOK)
@@ -323,7 +323,7 @@ static INT_PTR CALLBACK gg_genoptsdlgproc(HWND hwndDlg, UINT msg, WPARAM wParam,
 			if (gg->isonline())
 			{
 				if (MessageBox(
-					NULL,
+					nullptr,
 					TranslateT("You should disconnect before making any permanent changes with your account.\nDo you want to disconnect now?"),
 					gg->m_tszUserName,
 					MB_OKCANCEL | MB_ICONEXCLAMATION) == IDCANCEL)
@@ -705,14 +705,14 @@ static INT_PTR CALLBACK gg_detailsdlgproc(HWND hwndDlg, UINT msg, WPARAM wParam,
 					// Show updated message
 					if (dat->updating)
 					{
-						MessageBox(NULL, TranslateT("Your details has been uploaded to the public directory."),
+						MessageBox(nullptr, TranslateT("Your details has been uploaded to the public directory."),
 							gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);
 						dat->updating = FALSE;
 						break;
 					}
 
 					char *szProto = (hContact == NULL) ? gg->m_szModuleName : GetContactProto(hContact);
-					if (szProto == NULL)
+					if (szProto == nullptr)
 						break;
 
 					// Disable when updating
@@ -790,7 +790,7 @@ static INT_PTR CALLBACK gg_detailsdlgproc(HWND hwndDlg, UINT msg, WPARAM wParam,
 
 				if (!gg->isonline())
 				{
-					MessageBox(NULL,
+					MessageBox(nullptr,
 						TranslateT("You have to be logged in before you can change your details."),
 						gg->m_tszUserName, MB_OK | MB_ICONSTOP);
 					break;
@@ -799,7 +799,7 @@ static INT_PTR CALLBACK gg_detailsdlgproc(HWND hwndDlg, UINT msg, WPARAM wParam,
 				EnableWindow(GetDlgItem(hwndDlg, IDC_SAVE), FALSE);
 
 				gg_pubdir50_t req = gg_pubdir50_new(GG_PUBDIR50_WRITE);
-				if (req == NULL)
+				if (req == nullptr)
 					break;
 
 				GetDlgItemText(hwndDlg, IDC_FIRSTNAME, text, _countof(text));
@@ -910,7 +910,7 @@ int GGPROTO::details_init(WPARAM wParam, LPARAM lParam)
 	} else {
 		// Other user details
 		char* szProto = GetContactProto(hContact);
-		if (szProto == NULL)
+		if (szProto == nullptr)
 			return 0;
 		if (mir_strcmp(szProto, m_szModuleName) || isChatRoom(hContact))
 			return 0;
diff --git a/protocols/Gadu-Gadu/src/dynstuff.cpp b/protocols/Gadu-Gadu/src/dynstuff.cpp
index 9c9656da84..275a273aff 100644
--- a/protocols/Gadu-Gadu/src/dynstuff.cpp
+++ b/protocols/Gadu-Gadu/src/dynstuff.cpp
@@ -42,13 +42,13 @@ void *list_add_sorted(list_t *list, void *data, int alloc_size, int (*comparisio
 {

 	if (!list) {

 		errno = EFAULT;

-		return NULL;

+		return nullptr;

 	}

 

 	list_t newlist = (list_t)malloc(sizeof(struct list));

 

 	newlist->data = data;

-	newlist->next = NULL;

+	newlist->next = nullptr;

 

 	if (alloc_size) {

 		newlist->data = malloc(alloc_size);

@@ -64,7 +64,7 @@ void *list_add_sorted(list_t *list, void *data, int alloc_size, int (*comparisio
 				tmp = tmp->next;

 			tmp->next = newlist;

 		} else {

-			list_t prev = NULL;

+			list_t prev = nullptr;

 

 			while (comparision(newlist->data, tmp->data) > 0) {

 				prev = tmp;

@@ -94,7 +94,7 @@ void *list_add_sorted(list_t *list, void *data, int alloc_size, int (*comparisio
  */

 void *list_add(list_t *list, void *data, int alloc_size)

 {

-	return list_add_sorted(list, data, alloc_size, NULL);

+	return list_add_sorted(list, data, alloc_size, nullptr);

 }

 

 /*

@@ -108,7 +108,7 @@ void *list_add(list_t *list, void *data, int alloc_size)
  */

 int list_remove(list_t *list, void *data, int free_data)

 {

-	list_t tmp, last = NULL;

+	list_t tmp, last = nullptr;

 

 	if (!list || !*list) {

 		errno = EFAULT;

@@ -350,10 +350,10 @@ void string_clear(string_t s)
  */

 char *string_free(string_t s, int free_string)

 {

-	char *tmp = NULL;

+	char *tmp = nullptr;

 

 	if (!s)

-		return NULL;

+		return nullptr;

 

 	if (free_string)

 		free(s->str);

@@ -411,7 +411,7 @@ const char *ditoa(long int i)
 char **array_make(const char *string, const char *sep, int max, int trim, int quotes)

 {

 	const char *p, *q;

-	char **result = NULL;

+	char **result = nullptr;

 	int items = 0, last = 0;

 

 	if (!string || !sep)

@@ -419,7 +419,7 @@ char **array_make(const char *string, const char *sep, int max, int trim, int qu
 

 	for (p = string; ; ) {

 		int len = 0;

-		char *token = NULL;

+		char *token = nullptr;

 

 		if (max && items >= max - 1)

 			last = 1;

@@ -487,7 +487,7 @@ char **array_make(const char *string, const char *sep, int max, int trim, int qu
 

 		result = (char**)realloc(result, (items + 2) * sizeof(char*));

 		result[items] = token;

-		result[++items] = NULL;

+		result[++items] = nullptr;

 

 		if (!*p)

 			break;

@@ -532,7 +532,7 @@ void array_add(char ***array, char *string)
 	int count = array_count(*array);

 

 	*array = (char**)realloc(*array, (count + 2) * sizeof(char*));

-	(*array)[count + 1] = NULL;

+	(*array)[count + 1] = nullptr;

 	(*array)[count] = string;

 }

 

@@ -552,7 +552,7 @@ char *array_join(char **array, const char *sep)
 	if (!array)

 		return _strdup("");

 

-	string_t s = string_init(NULL);

+	string_t s = string_init(nullptr);

 	for (int i = 0; array[i]; i++) {

 		if (i)

 			string_append(s, sep);

diff --git a/protocols/Gadu-Gadu/src/filetransfer.cpp b/protocols/Gadu-Gadu/src/filetransfer.cpp
index 682e3656d0..4b9f547930 100644
--- a/protocols/Gadu-Gadu/src/filetransfer.cpp
+++ b/protocols/Gadu-Gadu/src/filetransfer.cpp
@@ -54,13 +54,13 @@ void GGPROTO::dccstart()
 #ifdef DEBUGMODE

 	debugLogA("dccstart(): ForkThreadEx 4 GGPROTO::dccmainthread");

 #endif

-	pth_dcc.hThread = ForkThreadEx(&GGPROTO::dccmainthread, NULL, &pth_dcc.dwThreadId);

+	pth_dcc.hThread = ForkThreadEx(&GGPROTO::dccmainthread, nullptr, &pth_dcc.dwThreadId);

 }

 

 void GGPROTO::dccconnect(uin_t uin)

 {

 	struct gg_dcc *local_dcc;

-	MCONTACT hContact = getcontact(uin, 0, 0, NULL);

+	MCONTACT hContact = getcontact(uin, 0, 0, nullptr);

 	DWORD ip, myuin; WORD port;

 

 	debugLogA("dccconnect(): Connecting to uin %d.", uin);

@@ -110,7 +110,7 @@ HANDLE ftfail(GGPROTO *gg, MCONTACT hContact)
 #ifdef DEBUGMODE

 	gg->debugLogA("ftfail(): Failing file transfer...");

 #endif

-	srand(time(NULL));

+	srand(time(nullptr));

 	ft->hProcess = (HANDLE)rand();

 	ft->hContact = hContact;

 #ifdef DEBUGMODE

@@ -139,7 +139,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 	char szFilename[MAX_PATH];

 

 	// Zero up lists

-	watches = transfers = requests = l = NULL;

+	watches = transfers = requests = l = nullptr;

 

 	debugLogA("dccmainthread(): started. DCC Server Thread Starting");

 

@@ -206,7 +206,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 		}

 

 		// Wait for data on selects

-		ret = select(maxfd + 1, &rd, &wd, NULL, &tv);

+		ret = select(maxfd + 1, &rd, &wd, nullptr, &tv);

 

 		// Check for select error

 		if (ret == -1)

@@ -248,7 +248,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 						gg_dcc_socket_free(local_dcc);

 

 						// Check if it's main socket

-						if (local_dcc == dcc) dcc = NULL;

+						if (local_dcc == dcc) dcc = nullptr;

 						continue;

 					} else {

 						gg_EnterCriticalSection(&ft_mutex, "dccmainthread", 37, "ft_mutex", 1);

@@ -260,7 +260,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 						// Client connected

 						case GG_EVENT_DCC_NEW:

 							list_add(&watches, e->event.dcc_new, 0);

-							e->event.dcc_new = NULL;

+							e->event.dcc_new = nullptr;

 							break;

 

 						//

@@ -275,7 +275,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								pfts.cbSize = sizeof(PROTOFILETRANSFERSTATUS);

 								pfts.hContact = (UINT_PTR)local_dcc->contact;

 								pfts.flags = (local_dcc->type == GG_SESSION_DCC_SEND);

-								pfts.pszFiles = NULL;

+								pfts.pszFiles = nullptr;

 								pfts.totalFiles = 1;

 								pfts.currentFileNumber = 0;

 								pfts.totalBytes = local_dcc->file_info.size;

@@ -305,7 +305,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								pfts.cbSize = sizeof(PROTOFILETRANSFERSTATUS);

 								pfts.hContact = (UINT_PTR)local_dcc->contact;

 								pfts.flags = (local_dcc->type == GG_SESSION_DCC_SEND);

-								pfts.pszFiles = NULL;

+								pfts.pszFiles = nullptr;

 								pfts.totalFiles = 1;

 								pfts.currentFileNumber = 0;

 								pfts.totalBytes = local_dcc->file_info.size;

@@ -324,7 +324,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								gg_EnterCriticalSection(&ft_mutex, "dccmainthread", 37, "ft_mutex", 1);

 							}

 							// Free dcc

-							gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = NULL;

+							gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = nullptr;

 							break;

 

 						// Client error

@@ -364,7 +364,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								gg_EnterCriticalSection(&ft_mutex, "dccmainthread", 37, "ft_mutex", 1);

 							}

 							// Free dcc

-							gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = NULL;

+							gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = nullptr;

 							break;

 

 						// Need file acknowledgement

@@ -380,13 +380,13 @@ void __cdecl GGPROTO::dccmainthread(void*)
 							// Add file recv request

 							{

 								// Make new ggtransfer struct

-								local_dcc->contact = (void*)getcontact(local_dcc->peer_uin, 0, 0, NULL);

+								local_dcc->contact = (void*)getcontact(local_dcc->peer_uin, 0, 0, nullptr);

 								wchar_t* filenameT = mir_utf8decodeW((char*)dcc->file_info.filename);

 

 								PROTORECVFILET pre = {0};

 								pre.dwFlags = PRFF_UNICODE;

 								pre.fileCount = 1;

-								pre.timestamp = time(NULL);

+								pre.timestamp = time(nullptr);

 								pre.descr.w = filenameT;

 								pre.files.w = &filenameT;

 								pre.lParam = (LPARAM)local_dcc;

@@ -403,13 +403,13 @@ void __cdecl GGPROTO::dccmainthread(void*)
 						case GG_EVENT_DCC_CLIENT_ACCEPT:

 							debugLogA("dccmainthread(): Client: %d, Client accept.", local_dcc->peer_uin);

 							// Check if user is on the list and if it is my uin

-							if (getcontact(local_dcc->peer_uin, 0, 0, NULL) &&

+							if (getcontact(local_dcc->peer_uin, 0, 0, nullptr) &&

 								getDword(GG_KEY_UIN, -1) == local_dcc->uin)

 								break;

 

 							// Kill unauthorized dcc

 							list_remove(&watches, dcc, 0);

-							gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = NULL;

+							gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = nullptr;

 							break;

 

 						// Client connected as we wished to (callback)

@@ -454,7 +454,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								debugLogA("dccmainthread(): Unknown request to client %d.", local_dcc->peer_uin);

 								// Kill unauthorized dcc

 								list_remove(&watches, local_dcc, 0);

-								gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = NULL;

+								gg_free_dcc(local_dcc); if (local_dcc == dcc) dcc = nullptr;

 							}

 							break;

 						}

@@ -503,7 +503,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								pfts.cbSize = sizeof(PROTOFILETRANSFERSTATUS);

 								pfts.hContact = (UINT_PTR)local_dcc7->contact;

 								pfts.flags = (local_dcc7->type == GG_SESSION_DCC7_SEND);

-								pfts.pszFiles = NULL;

+								pfts.pszFiles = nullptr;

 								pfts.totalFiles = 1;

 								pfts.currentFileNumber = 0;

 								pfts.totalBytes = local_dcc7->size;

@@ -533,7 +533,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 								pfts.cbSize = sizeof(PROTOFILETRANSFERSTATUS);

 								pfts.hContact = (UINT_PTR)local_dcc7->contact;

 								pfts.flags = (local_dcc7->type == GG_SESSION_DCC7_SEND);

-								pfts.pszFiles = NULL;

+								pfts.pszFiles = nullptr;

 								pfts.totalFiles = 1;

 								pfts.currentFileNumber = 0;

 								pfts.totalBytes = local_dcc7->size;

@@ -625,7 +625,7 @@ void __cdecl GGPROTO::dccmainthread(void*)
 			gg_dcc_socket_free(local_dcc);

 

 			// Check if it's main socket

-			if (local_dcc == dcc) dcc = NULL;

+			if (local_dcc == dcc) dcc = nullptr;

 		}

 	}

 	// Close all waiting for aknowledgle transfers

@@ -683,7 +683,7 @@ HANDLE GGPROTO::dccfileallow(HANDLE hTransfer, const wchar_t* szPath)
 		ProtoBroadcastAck((UINT_PTR)dcc->contact, ACKTYPE_FILE, ACKRESULT_FAILED, dcc, 0);

 		// Free transfer

 		gg_free_dcc(dcc);

-		return 0;

+		return nullptr;

 	}

 

 	// Put an offset to the file

@@ -719,7 +719,7 @@ HANDLE GGPROTO::dcc7fileallow(HANDLE hTransfer, const wchar_t* szPath)
 		ProtoBroadcastAck((UINT_PTR)dcc7->contact, ACKTYPE_FILE, ACKRESULT_DENIED, dcc7, 0);

 		// Free transfer

 		gg_dcc7_free(dcc7);

-		return 0;

+		return nullptr;

 	}

 

 	// Open file for appending and check if ok

@@ -733,7 +733,7 @@ HANDLE GGPROTO::dcc7fileallow(HANDLE hTransfer, const wchar_t* szPath)
 		ProtoBroadcastAck((UINT_PTR)dcc7->contact, ACKTYPE_FILE, ACKRESULT_FAILED, dcc7, 0);

 		// Free transfer

 		gg_dcc7_free(dcc7);

-		return 0;

+		return nullptr;

 	}

 

 	// Put an offset to the file

@@ -855,7 +855,7 @@ HANDLE GGPROTO::FileAllow(MCONTACT, HANDLE hTransfer, const wchar_t* szPath)
 	// Check if its proper dcc

 	struct gg_common *c = (struct gg_common *) hTransfer;

 	if (!c)

-		return NULL;

+		return nullptr;

 

 	if (c->type == GG_SESSION_DCC7_GET)

 		return dcc7fileallow(hTransfer, szPath);

@@ -930,7 +930,7 @@ HANDLE GGPROTO::SendFile(MCONTACT hContact, const wchar_t *, wchar_t** ppszFiles
 	if ((ver & 0x00ffffff) >= 0x29 || !ver) {

 

 		gg_EnterCriticalSection(&sess_mutex, "SendFile", 46, "sess_mutex", 1);

-		struct gg_dcc7 *dcc7 = gg_dcc7_send_file(sess, uin, filename, NULL, NULL);

+		struct gg_dcc7 *dcc7 = gg_dcc7_send_file(sess, uin, filename, nullptr, nullptr);

 		if (!dcc7) {

 			gg_LeaveCriticalSection(&sess_mutex, "SendFile", 46, 1, "sess_mutex", 1);

 			debugLogA("SendFile(): Failed to send file \"%s\".", filename);

@@ -967,7 +967,7 @@ HANDLE GGPROTO::SendFile(MCONTACT hContact, const wchar_t *, wchar_t** ppszFiles
 	}

 

 	// Try to connect if not ask user to connect me

-	struct gg_dcc *dcc = NULL;

+	struct gg_dcc *dcc = nullptr;

 	if ((ip && port >= 10 && !(dcc = gg_dcc_send_file(ip, port, myuin, uin))) || (port < 10 && port > 0))

 	{

 		// Make fake dcc structure

diff --git a/protocols/Gadu-Gadu/src/gg.cpp b/protocols/Gadu-Gadu/src/gg.cpp
index cf2ec94613..9f343b52cd 100644
--- a/protocols/Gadu-Gadu/src/gg.cpp
+++ b/protocols/Gadu-Gadu/src/gg.cpp
@@ -47,8 +47,8 @@ int hLangpack;
 LIST<GGPROTO> g_Instances(1, PtrKeySortT);

 

 // Event hooks

-static HANDLE hHookModulesLoaded = NULL;

-static HANDLE hHookPreShutdown = NULL;

+static HANDLE hHookModulesLoaded = nullptr;

+static HANDLE hHookPreShutdown = nullptr;

 

 static unsigned long crc_table[256];

 

@@ -63,7 +63,7 @@ wchar_t* ws_strerror(int code)
    if (code == 0)

    {

       wchar_t buff[128];

-      int len = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, WSAGetLastError(), 0, buff, _countof(buff), NULL);

+      int len = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, WSAGetLastError(), 0, buff, _countof(buff), nullptr);

       if (len == 0)

          mir_snwprintf(err_desc, L"WinSock %u: Unknown error.", WSAGetLastError());

       else

@@ -83,7 +83,7 @@ char* as_strerror(int code)
    if (code == 0)

    {

       char buff[128];

-      int len = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, WSAGetLastError(), 0, buff, _countof(buff), NULL);

+      int len = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, WSAGetLastError(), 0, buff, _countof(buff), nullptr);

       if (len == 0)

          mir_snprintf(err_desc, "WinSock %u: Unknown error.", WSAGetLastError());

       else

@@ -216,14 +216,14 @@ static int gg_modulesloaded(WPARAM, LPARAM)
 static GGPROTO* gg_getprotoinstance(MCONTACT hContact)

 {

    char* szProto = GetContactProto(hContact);

-   if (szProto == NULL)

-      return NULL;

+   if (szProto == nullptr)

+      return nullptr;

 

    for (int i=0; i < g_Instances.getCount(); i++)

       if (mir_strcmp(szProto, g_Instances[i]->m_szModuleName) == 0)

          return g_Instances[i];

 

-   return NULL;

+   return nullptr;

 }

 

 //////////////////////////////////////////////////////////

@@ -232,7 +232,7 @@ static GGPROTO* gg_getprotoinstance(MCONTACT hContact)
 static int gg_prebuildcontactmenu(WPARAM hContact, LPARAM)

 {

    GGPROTO* gg = gg_getprotoinstance(hContact);

-   if (gg == NULL)

+   if (gg == nullptr)

       return 0;

 

    if (gg->getDword(hContact, GG_KEY_UIN, 0) == gg->getByte(GG_KEY_UIN, 0) || gg->isChatRoom(hContact) || db_get_b(hContact, "CList", "NotOnList", 0))

@@ -442,7 +442,7 @@ void gg_debughandler(int level, const char *format, va_list ap)
    memcpy(szText, prefix, PREFIXLEN);

 

    mir_vsnprintf(szText + mir_strlen(szText), sizeof(szText) - mir_strlen(szText), szFormat, ap);

-   Netlib_Log(NULL, szText);

+   Netlib_Log(nullptr, szText);

    free(szFormat);

 }

 #endif

diff --git a/protocols/Gadu-Gadu/src/gg_proto.cpp b/protocols/Gadu-Gadu/src/gg_proto.cpp
index 3fe2a9d605..d0ff63102f 100644
--- a/protocols/Gadu-Gadu/src/gg_proto.cpp
+++ b/protocols/Gadu-Gadu/src/gg_proto.cpp
@@ -254,14 +254,14 @@ void __cdecl GGPROTO::searchthread(void *)
 HANDLE GGPROTO::SearchBasic(const wchar_t *id)

 {

 	if (!isonline())

-		return 0;

+		return nullptr;

 

 	gg_pubdir50_t req = gg_pubdir50_new(GG_PUBDIR50_SEARCH);

 	if (!req) {

 	#ifdef DEBUGMODE

 		debugLogA("SearchBasic(): ForkThread 10 GGPROTO::searchthread");

 	#endif

-		ForkThread(&GGPROTO::searchthread, NULL);

+		ForkThread(&GGPROTO::searchthread, nullptr);

 		return (HANDLE)1;

 	}

 

@@ -275,7 +275,7 @@ HANDLE GGPROTO::SearchBasic(const wchar_t *id)
 	#ifdef DEBUGMODE

 		debugLogA("SearchBasic(): ForkThread 11 GGPROTO::searchthread");

 	#endif

-		ForkThread(&GGPROTO::searchthread, NULL);

+		ForkThread(&GGPROTO::searchthread, nullptr);

 		return (HANDLE)1;

 	}

 	gg_LeaveCriticalSection(&sess_mutex, "SearchBasic", 50, 2, "sess_mutex", 1);

@@ -292,17 +292,17 @@ HANDLE GGPROTO::SearchByName(const wchar_t *nick, const wchar_t *firstName, cons
 {

 	// Check if connected and if there's a search data

 	if (!isonline())

-		return 0;

+		return nullptr;

 

 	if (!nick && !firstName && !lastName)

-		return 0;

+		return nullptr;

 

 	gg_pubdir50_t req = gg_pubdir50_new(GG_PUBDIR50_SEARCH);

-	if (req == NULL) {

+	if (req == nullptr) {

 	#ifdef DEBUGMODE

 		debugLogA("SearchByName(): ForkThread 12 GGPROTO::searchthread");

 	#endif

-		ForkThread(&GGPROTO::searchthread, NULL);

+		ForkThread(&GGPROTO::searchthread, nullptr);

 		return (HANDLE)1;

 	}

 

@@ -343,7 +343,7 @@ HANDLE GGPROTO::SearchByName(const wchar_t *nick, const wchar_t *firstName, cons
 	#ifdef DEBUGMODE

 		debugLogA("SearchByName(): ForkThread 13 GGPROTO::searchthread");

 	#endif

-		ForkThread(&GGPROTO::searchthread, NULL);

+		ForkThread(&GGPROTO::searchthread, nullptr);

 	}

 	else

 	{

@@ -362,14 +362,14 @@ HWND GGPROTO::SearchAdvanced(HWND hwndDlg)
 {

 	// Check if connected

 	if (!isonline())

-		return 0;

+		return nullptr;

 

 	gg_pubdir50_t req = gg_pubdir50_new(GG_PUBDIR50_SEARCH);

 	if (!req) {

 	#ifdef DEBUGMODE

 		debugLogA("SearchAdvanced(): ForkThread 14 GGPROTO::searchthread");

 	#endif

-		ForkThread(&GGPROTO::searchthread, NULL);

+		ForkThread(&GGPROTO::searchthread, nullptr);

 		return (HWND)1;

 	}

 

@@ -413,7 +413,7 @@ HWND GGPROTO::SearchAdvanced(HWND hwndDlg)
 	if (mir_wstrlen(text)) {

 		int yearTo = _tstoi(text);

 		int yearFrom;

-		time_t t = time(NULL);

+		time_t t = time(nullptr);

 		struct tm *lt = localtime(&t);

 		int ay = lt->tm_year + 1900;

 		char age[16];

@@ -459,7 +459,7 @@ HWND GGPROTO::SearchAdvanced(HWND hwndDlg)
 	// No data entered

 	if (szQuery.GetLength() <= 7 || (szQuery.GetLength() == 8 && IsDlgButtonChecked(hwndDlg, IDC_ONLYCONNECTED))) {

 		gg_pubdir50_free(req);

-		return 0;

+		return nullptr;

 	}

 

 	// Count crc & check if the data was equal if yes do same search with shift

@@ -479,7 +479,7 @@ HWND GGPROTO::SearchAdvanced(HWND hwndDlg)
 		#ifdef DEBUGMODE

 			debugLogA("SearchAdvanced(): ForkThread 15 GGPROTO::searchthread");

 		#endif

-			ForkThread(&GGPROTO::searchthread, NULL);

+			ForkThread(&GGPROTO::searchthread, nullptr);

 			return (HWND)1;

 		}

 		gg_LeaveCriticalSection(&sess_mutex, "SearchAdvanced", 52, 2, "sess_mutex", 1);

@@ -663,7 +663,7 @@ int GGPROTO::SetAwayMsg(int iStatus, const wchar_t *newMsg)
 	else {

 		if (*msgPtr)

 			mir_free(*msgPtr);

-		*msgPtr = newMsg && *newMsg ? mir_wstrdup(newMsg) : NULL;

+		*msgPtr = newMsg && *newMsg ? mir_wstrdup(newMsg) : nullptr;

 	#ifdef DEBUGMODE

 		debugLogA("SetAwayMsg(): Message changed.");

 	#endif

diff --git a/protocols/Gadu-Gadu/src/groupchat.cpp b/protocols/Gadu-Gadu/src/groupchat.cpp
index f916ee62fd..e88190e763 100644
--- a/protocols/Gadu-Gadu/src/groupchat.cpp
+++ b/protocols/Gadu-Gadu/src/groupchat.cpp
@@ -86,7 +86,7 @@ int GGPROTO::gc_destroy()
 		GGGC *chat = (GGGC *)l->data;

 		free(chat->recipients);

 	}

-	list_destroy(chats, 1); chats = NULL;

+	list_destroy(chats, 1); chats = nullptr;

 	return 1;

 }

 

@@ -102,13 +102,13 @@ GGGC* GGPROTO::gc_lookup(const wchar_t *id)
 			return chat;

 	}

 

-	return NULL;

+	return nullptr;

 }

 

 int GGPROTO::gc_event(WPARAM, LPARAM lParam)

 {

 	GCHOOK *gch = (GCHOOK *)lParam;

-	GGGC *chat = NULL;

+	GGGC *chat = nullptr;

 	uin_t uin;

 

 	// Check if we got our protocol, and fields are set

@@ -164,7 +164,7 @@ int GGPROTO::gc_event(WPARAM, LPARAM lParam)
 		while(lc >= 0 && (gch->ptszText[lc] == '\n' || gch->ptszText[lc] == '\r'))

 			gch->ptszText[lc --] = 0;

 

-		gce.time = time(NULL);

+		gce.time = time(nullptr);

 		gce.bIsMe = 1;

 		gce.dwFlags = GCEF_ADDTOLOG;

 		debugLogW(L"gc_event(): Sending conference message to room %s, \"%s\".", gch->ptszID, gch->ptszText);

@@ -182,7 +182,7 @@ int GGPROTO::gc_event(WPARAM, LPARAM lParam)
 	if (gch->iType == GC_USER_PRIVMESS)

 	{

 		MCONTACT hContact = NULL;

-		if ((uin = _wtoi(gch->ptszUID)) && (hContact = getcontact(uin, 1, 0, NULL)))

+		if ((uin = _wtoi(gch->ptszUID)) && (hContact = getcontact(uin, 1, 0, nullptr)))

 			CallService(MS_MSG_SENDMESSAGE, hContact, 0);

 	}

 	debugLogW(L"gc_event(): Unhandled event %d, chat %x, uin %d, text \"%s\".", gch->iType, chat, uin, gch->ptszText);

@@ -209,7 +209,7 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 	uin_t uin;

 

 	debugLogA("gc_getchat(): Count %d.", recipients_count);

-	if (!recipients) return NULL;

+	if (!recipients) return nullptr;

 

 	// Look for existing chat

 	for(l = chats; l; l = l->next)

@@ -240,7 +240,7 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 					debugLogW(L"gc_getchat(): Ignoring existing id %s, size %d.", chat->id, chat->recipients_count);

 				else

 					debugLogW(L"gc_getchat(): Returning existing id %s, size %d.", chat->id, chat->recipients_count);

-				return !(chat->ignore) ? chat->id : NULL;

+				return !(chat->ignore) ? chat->id : nullptr;

 			}

 		}

 	}

@@ -253,10 +253,10 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 	// Check groupchat policy (new) / only for incoming

 	if (sender)

 	{

-		int unknown = (getcontact(sender, 0, 0, NULL) == NULL),

+		int unknown = (getcontact(sender, 0, 0, nullptr) == NULL),

 			unknownSender = unknown;

 		for(int i = 0; i < recipients_count; i++)

-			if (!getcontact(recipients[i], 0, 0, NULL))

+			if (!getcontact(recipients[i], 0, 0, nullptr))

 				unknown ++;

 		if ((getWord(GG_KEY_GC_POLICY_DEFAULT, GG_KEYDEF_GC_POLICY_DEFAULT) == 2) ||

 		   (getWord(GG_KEY_GC_POLICY_TOTAL, GG_KEYDEF_GC_POLICY_TOTAL) == 2 &&

@@ -271,11 +271,11 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 			unknown >= getWord(GG_KEY_GC_COUNT_UNKNOWN, GG_KEYDEF_GC_COUNT_UNKNOWN))))

 		{

 			wchar_t *senderName = unknownSender ?

-				TranslateT("Unknown") : pcli->pfnGetContactDisplayName(getcontact(sender, 0, 0, NULL), 0);

+				TranslateT("Unknown") : pcli->pfnGetContactDisplayName(getcontact(sender, 0, 0, nullptr), 0);

 			wchar_t error[256];

 			mir_snwprintf(error, TranslateT("%s has initiated conference with %d participants (%d unknowns).\nDo you want to participate?"),

 				senderName, recipients_count + 1, unknown);

-			chat->ignore = MessageBox(NULL, error, m_tszUserName, MB_OKCANCEL | MB_ICONEXCLAMATION) != IDOK;

+			chat->ignore = MessageBox(nullptr, error, m_tszUserName, MB_OKCANCEL | MB_ICONEXCLAMATION) != IDOK;

 		}

 		if (chat->ignore)

 		{

@@ -288,7 +288,7 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 			if (sender) chat->recipients[i] = sender;

 			debugLogW(L"gc_getchat(): Ignoring new chat %s, count %d.", chat->id, chat->recipients_count);

 			list_add(&chats, chat, 0);

-			return NULL;

+			return nullptr;

 		}

 	}

 

@@ -297,12 +297,12 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 	wchar_t *senderName;

 	if (sender)

 	{

-		senderName = pcli->pfnGetContactDisplayName(getcontact(sender, 1, 0, NULL), 0);

+		senderName = pcli->pfnGetContactDisplayName(getcontact(sender, 1, 0, nullptr), 0);

 		mir_snwprintf(status, TranslateT("%s initiated the conference.") , senderName);

 	}

 	else

 	{

-		senderName = NULL;

+		senderName = nullptr;

 		mir_snwprintf(status, TranslateT("This is my own conference."));

 	}

 

@@ -346,7 +346,7 @@ wchar_t* GGPROTO::gc_getchat(uin_t sender, uin_t *recipients, int recipients_cou
 

 	// Add contacts

 	for(i = 0; i < chat->recipients_count; i++) {

-		MCONTACT hContact = getcontact(chat->recipients[i], 1, 0, NULL);

+		MCONTACT hContact = getcontact(chat->recipients[i], 1, 0, nullptr);

 		UIN2IDT(chat->recipients[i], id);

 		if (hContact)

 			gce.ptszNick = pcli->pfnGetContactDisplayName(hContact, 0);

@@ -431,7 +431,7 @@ static INT_PTR CALLBACK gg_gc_openconfdlg(HWND hwndDlg, UINT message, WPARAM wPa
 					// Check if connected

 					if (!gg->isonline())

 					{

-						MessageBox(NULL,

+						MessageBox(nullptr,

 							TranslateT("You have to be connected to open new conference."),

 							gg->m_tszUserName, MB_OK | MB_ICONSTOP);

 					}

@@ -500,7 +500,7 @@ static INT_PTR CALLBACK gg_gc_openconfdlg(HWND hwndDlg, UINT message, WPARAM wPa
 										uin = (uin_t)gg->getDword(hContact, GG_KEY_UIN, 0);

 									}

 

-									if (szProto == NULL || mir_strcmp(szProto, gg->m_szModuleName) || !uin || uin == gg->getDword(GG_KEY_UIN, 0))

+									if (szProto == nullptr || mir_strcmp(szProto, gg->m_szModuleName) || !uin || uin == gg->getDword(GG_KEY_UIN, 0))

 										SendDlgItemMessage(hwndDlg, IDC_CLIST, CLM_DELETEITEM, (WPARAM)hItem, 0);

 								}

 							}

@@ -556,7 +556,7 @@ INT_PTR GGPROTO::gc_clearignored(WPARAM, LPARAM)
 			cleared = TRUE;

 		}

 	}

-	MessageBox( NULL,

+	MessageBox( nullptr,

 		cleared ?

 			TranslateT("All ignored conferences are now unignored and the conference policy will act again.") :

 			TranslateT("There are no ignored conferences."),

@@ -571,14 +571,14 @@ INT_PTR GGPROTO::gc_openconf(WPARAM, LPARAM)
 	// Check if connected

 	if (!isonline())

 	{

-		MessageBox(NULL,

+		MessageBox(nullptr,

 			TranslateT("You have to be connected to open new conference."),

 			m_tszUserName, MB_OK | MB_ICONSTOP

 		);

 		return 0;

 	}

 

-	CreateDialogParam(hInstance, MAKEINTRESOURCE(IDD_CONFERENCE), NULL, gg_gc_openconfdlg, (LPARAM)this);

+	CreateDialogParam(hInstance, MAKEINTRESOURCE(IDD_CONFERENCE), nullptr, gg_gc_openconfdlg, (LPARAM)this);

 	return 1;

 }

 

diff --git a/protocols/Gadu-Gadu/src/icolib.cpp b/protocols/Gadu-Gadu/src/icolib.cpp
index 3a5d05451a..b4cf97f5bf 100644
--- a/protocols/Gadu-Gadu/src/icolib.cpp
+++ b/protocols/Gadu-Gadu/src/icolib.cpp
@@ -58,7 +58,8 @@ HANDLE GetIconHandle(int iconId)
 	for(int i = 0; i < _countof(iconList); i++)

 		if (iconList[i].defIconID == iconId)

 			return iconList[i].hIcolib;

-	return NULL;

+

+	return nullptr;

 }

 

 void ReleaseIconEx(const char* name, bool big)

diff --git a/protocols/Gadu-Gadu/src/image.cpp b/protocols/Gadu-Gadu/src/image.cpp
index 1c5b90f3df..0cfef60aed 100644
--- a/protocols/Gadu-Gadu/src/image.cpp
+++ b/protocols/Gadu-Gadu/src/image.cpp
@@ -159,7 +159,7 @@ int gg_img_paint(HWND hwnd, GGIMAGEENTRY *dat)
 

 	if (dat->hBitmap)

 	{

-		HDC hdcBmp = NULL;

+		HDC hdcBmp = nullptr;

 		int nWidth, nHeight;

 		BITMAP bmp;

 

@@ -224,10 +224,10 @@ wchar_t *gg_img_getfilter(wchar_t *szFilter, int nSize)
 	// Make up filter

 	wcsncpy(pFilter, szFilterName, nSize);

 	pFilter += mir_wstrlen(pFilter) + 1;

-	if (pFilter >= szFilter + nSize) return NULL;

+	if (pFilter >= szFilter + nSize) return nullptr;

 	wcsncpy(pFilter, szFilterMask, nSize - (pFilter - szFilter));

 	pFilter += mir_wstrlen(pFilter) + 1;

-	if (pFilter >= szFilter + nSize) return NULL;

+	if (pFilter >= szFilter + nSize) return nullptr;

 	*pFilter = 0;

 

 	return szFilter;

@@ -287,7 +287,7 @@ BOOL gg_img_fit(HWND hwndDlg)
 	int rWidth = 0, rHeight = 0;

 	int oWidth = 0, oHeight = 0;

 	BITMAP bmp;

-	GGIMAGEENTRY *img = NULL;

+	GGIMAGEENTRY *img = nullptr;

 	HDC hdc;

 

 	// Check if image is loaded

@@ -340,7 +340,7 @@ BOOL gg_img_fit(HWND hwndDlg)
 			oHeight = dlgRect.bottom - dlgRect.top;

 		oWidth = wrkRect.right - wrkRect.left;

 	}

-	SetWindowPos(hwndDlg, NULL,

+	SetWindowPos(hwndDlg, nullptr,

 		(wrkRect.left + wrkRect.right - oWidth) / 2,

 		(wrkRect.top + wrkRect.bottom - oHeight) / 2,

 		oWidth, oHeight,

@@ -434,7 +434,7 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 	case WM_SIZE:

 		Utils_ResizeDialog(hwndDlg, hInstance, dat->bReceiving ? MAKEINTRESOURCEA(IDD_IMAGE_RECV) : MAKEINTRESOURCEA(IDD_IMAGE_SEND), sttImageDlgResizer);

 		if (wParam == SIZE_RESTORED || wParam == SIZE_MAXIMIZED)

-			InvalidateRect(hwndDlg, NULL, FALSE);

+			InvalidateRect(hwndDlg, nullptr, FALSE);

 		return 0;

 

 	case WM_SIZING:

@@ -536,7 +536,7 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 			if (dat->nImg > 1)

 			{

 				dat->nImg--;

-				InvalidateRect(hwndDlg, NULL, FALSE);

+				InvalidateRect(hwndDlg, nullptr, FALSE);

 			}

 			return TRUE;

 

@@ -544,7 +544,7 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 			if (dat->nImg < dat->nImgTotal)

 			{

 				dat->nImg++;

-				InvalidateRect(hwndDlg, NULL, FALSE);

+				InvalidateRect(hwndDlg, nullptr, FALSE);

 			}

 			return TRUE;

 

@@ -573,7 +573,7 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 				if ((-- dat->nImgTotal) == 0)

 					EndDialog(hwndDlg, 0);

 				else

-					InvalidateRect(hwndDlg, NULL, FALSE);

+					InvalidateRect(hwndDlg, nullptr, FALSE);

 

 				gg_img_releasepicture(del);

 			}

@@ -603,8 +603,8 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 				if (dat->lpImages && gg->isonline())

 				{

 					uin_t uin = (uin_t)gg->getDword(dat->hContact, GG_KEY_UIN, 0);

-					struct gg_msg_richtext_format *r = NULL;

-					struct gg_msg_richtext_image *p = NULL;

+					struct gg_msg_richtext_format *r = nullptr;

+					struct gg_msg_richtext_image *p = nullptr;

 					int len;

 

 					((struct gg_msg_richtext*)format)->flag = 2;

@@ -654,7 +654,7 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 		}

 		// Fit window to image

 		if (!gg_img_fit(hwndDlg))

-			InvalidateRect(hwndDlg, NULL, FALSE);

+			InvalidateRect(hwndDlg, nullptr, FALSE);

 		return TRUE;

 

 	case WM_CHOOSEIMG:

@@ -677,13 +677,13 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 			{

 				if (dat->lpImages)

 					gg_img_releasepicture(dat->lpImages);

-				if (!(dat->lpImages = (GGIMAGEENTRY *)dat->gg->img_loadpicture(0, szFileName)))

+				if (!(dat->lpImages = (GGIMAGEENTRY *)dat->gg->img_loadpicture(nullptr, szFileName)))

 				{

 					EndDialog(hwndDlg, 0);

 					return FALSE;

 				}

 				if (!gg_img_fit(hwndDlg))

-					InvalidateRect(hwndDlg, NULL, FALSE);

+					InvalidateRect(hwndDlg, nullptr, FALSE);

 			}

 			else

 			{

@@ -702,7 +702,7 @@ static INT_PTR CALLBACK gg_img_dlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LP
 //

 void __cdecl GGPROTO::img_dlgcallthread(void *param)

 {

-	HWND hMIWnd = 0;

+	HWND hMIWnd = nullptr;

 

 	debugLogA("img_dlgcallthread(): started.");

 	GGIMAGEDLGDATA *dat = (GGIMAGEDLGDATA *)param;

@@ -722,7 +722,7 @@ GGIMAGEDLGDATA *gg_img_recvdlg(GGPROTO *gg, MCONTACT hContact)
 	// Create dialog data

 	GGIMAGEDLGDATA *dat = (GGIMAGEDLGDATA *)calloc(1, sizeof(GGIMAGEDLGDATA));

 	dat->hContact = hContact;

-	dat->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

+	dat->hEvent = CreateEvent(nullptr, TRUE, FALSE, nullptr);

 	dat->bReceiving = TRUE;

 	dat->gg = gg;

 	ResetEvent(dat->hEvent);

@@ -771,10 +771,10 @@ int gg_img_isexists(wchar_t *szPath, GGIMAGEENTRY *dat)
 //

 wchar_t *gg_img_hasextension(wchar_t *filename)

 {

-	if (filename != NULL && *filename != '\0')

+	if (filename != nullptr && *filename != '\0')

 	{

 		wchar_t *imgtype = wcsrchr(filename, '.');

-		if (imgtype != NULL)

+		if (imgtype != nullptr)

 		{

 			size_t len = mir_wstrlen(imgtype);

 			imgtype++;

@@ -787,7 +787,7 @@ wchar_t *gg_img_hasextension(wchar_t *filename)
 				return --imgtype;

 		}

 	}

-	return NULL;

+	return nullptr;

 }

 

 ////////////////////////////////////////////////////////////////////////////////

@@ -800,7 +800,7 @@ int GGPROTO::img_displayasmsg(MCONTACT hContact, void *img)
 	size_t tPathLen;

 	int i, res;

 

-	if (hImagesFolder == NULL || FoldersGetCustomPathT(hImagesFolder, path, MAX_PATH, L"")) {

+	if (hImagesFolder == nullptr || FoldersGetCustomPathT(hImagesFolder, path, MAX_PATH, L"")) {

 		wchar_t *tmpPath = Utils_ReplaceVarsW( L"%miranda_userdata%");

 		tPathLen = mir_snwprintf(szPath, L"%s\\%s\\ImageCache", tmpPath, m_tszUserName);

 		mir_free(tmpPath);

@@ -823,7 +823,7 @@ int GGPROTO::img_displayasmsg(MCONTACT hContact, void *img)
 	}

 

 	mir_snwprintf(szPath + tPathLen, MAX_PATH - tPathLen, L"\\%s", dat->lpszFileName);

-	if ((pImgext = gg_img_hasextension(szPath)) == NULL)

+	if ((pImgext = gg_img_hasextension(szPath)) == nullptr)

 		pImgext = szPath + mir_wstrlen(szPath);

 	wcsncpy_s(imgext, pImgext, _TRUNCATE);

 	for (i = 1; ; ++i)

@@ -853,7 +853,7 @@ int GGPROTO::img_displayasmsg(MCONTACT hContact, void *img)
 

 		T2Utf szMessage(image_msg);

 		PROTORECVEVENT pre = {0};

-		pre.timestamp = time(NULL);

+		pre.timestamp = time(nullptr);

 		pre.szMessage = szMessage;

 		ProtoChainRecvMsg(hContact, &pre);

 		debugLogW(L"img_displayasmsg(): Image saved to %s.", szPath);

@@ -885,7 +885,7 @@ BOOL GGPROTO::img_opened(uin_t uin)
 int GGPROTO::img_display(MCONTACT hContact, void *img)

 {

 	list_t l = imagedlgs;

-	GGIMAGEDLGDATA *dat = NULL;

+	GGIMAGEDLGDATA *dat = nullptr;

 

 	if (!img) return FALSE;

 

@@ -899,7 +899,7 @@ int GGPROTO::img_display(MCONTACT hContact, void *img)
 		l = l->next;

 	}

 

-	if (!l) dat = NULL;

+	if (!l) dat = nullptr;

 

 	if (!dat)

 	{

@@ -908,7 +908,7 @@ int GGPROTO::img_display(MCONTACT hContact, void *img)
 

 		while (WaitForSingleObjectEx(dat->hEvent, INFINITE, TRUE) != WAIT_OBJECT_0);

 		CloseHandle(dat->hEvent);

-		dat->hEvent = NULL;

+		dat->hEvent = nullptr;

 

 		list_add(&imagedlgs, dat, 0);

 	}

@@ -917,7 +917,7 @@ int GGPROTO::img_display(MCONTACT hContact, void *img)
 	SendMessage(dat->hWnd, WM_ADDIMAGE, 0, (LPARAM)img);

 	if (/*db_get_b(NULL, "Chat", "bFlashWindowHighlight", 0) != 0 && */

 		GetActiveWindow() != dat->hWnd && GetForegroundWindow() != dat->hWnd)

-		SetTimer(dat->hWnd, TIMERID_FLASHWND, 900, NULL);

+		SetTimer(dat->hWnd, TIMERID_FLASHWND, 900, nullptr);

 

 	return TRUE;

 }

@@ -927,7 +927,7 @@ int GGPROTO::img_display(MCONTACT hContact, void *img)
 //

 const wchar_t *gg_img_guessfileextension(const char *lpData)

 {

-	if (lpData != NULL)

+	if (lpData != nullptr)

 	{

 		if (memcmp(lpData, "BM", 2) == 0)

 			return L".bmp";

@@ -948,11 +948,11 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 {

 	if (!szFileName &&

 		(!e || !e->event.image_reply.size || !e->event.image_reply.image || !e->event.image_reply.filename))

-		return NULL;

+		return nullptr;

 

 	GGIMAGEENTRY *dat = (GGIMAGEENTRY *)calloc(1, sizeof(GGIMAGEENTRY));

-	if (dat == NULL)

-		return NULL;

+	if (dat == nullptr)

+		return nullptr;

 

 	// Copy the file name

 	if (szFileName)

@@ -964,7 +964,7 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 			wchar_t error[512];

 			mir_snwprintf(error, TranslateT("Cannot open image file. ERROR: %d: %s\n%s"), errno, _tcserror(errno), szFileName);

 			showpopup(m_tszUserName, error, GG_POPUP_ERROR);

-			return NULL;

+			return nullptr;

 		}

 		fseek(fp, 0, SEEK_END);

 		dat->nSize = ftell(fp);

@@ -973,7 +973,7 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 			fclose(fp);

 			free(dat);

 			debugLogW(L"img_loadpicture(): Zero file size \"%s\" failed.", szFileName);

-			return NULL;

+			return nullptr;

 		}

 		// Maximum acceptable image size

 		if (dat->nSize > 255 * 1024)

@@ -981,8 +981,8 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 			fclose(fp);

 			free(dat);

 			debugLogW(L"img_loadpicture(): Image size of \"%s\" exceeds 255 KB.", szFileName);

-			MessageBox(NULL, TranslateT("Image exceeds maximum allowed size of 255 KB."), m_tszUserName, MB_OK | MB_ICONEXCLAMATION);

-			return NULL;

+			MessageBox(nullptr, TranslateT("Image exceeds maximum allowed size of 255 KB."), m_tszUserName, MB_OK | MB_ICONEXCLAMATION);

+			return nullptr;

 		}

 		fseek(fp, 0, SEEK_SET);

 		dat->lpData = (char*)malloc(dat->nSize);

@@ -992,7 +992,7 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 			fclose(fp);

 			free(dat);

 			debugLogW(L"img_loadpicture(): Reading file \"%s\" failed.", szFileName);

-			return NULL;

+			return nullptr;

 		}

 		fclose(fp);

 		dat->lpszFileName = wcsdup(szFileName);

@@ -1010,14 +1010,14 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 			const wchar_t *szImgType = gg_img_guessfileextension(dat->lpData);

 			if (*szImgType) {

 				dat->lpszFileName = (wchar_t*)calloc(sizeof(wchar_t), mir_wstrlen(tmpFileName) + mir_wstrlen(szImgType) + 1);

-				if (dat->lpszFileName != NULL) {

+				if (dat->lpszFileName != nullptr) {

 					mir_wstrcpy(dat->lpszFileName, tmpFileName);

 					mir_wstrcat(dat->lpszFileName, szImgType);

 				}

 			}

 		}

 

-		if (dat->lpszFileName == NULL)

+		if (dat->lpszFileName == nullptr)

 			dat->lpszFileName = wcsdup( _A2T( e->event.image_reply.filename));

 	}

 

@@ -1048,7 +1048,7 @@ void* GGPROTO::img_loadpicture(gg_event* e, wchar_t *szFileName)
 		free(dat->lpszFileName);

 		free(dat);

 	}

-	return NULL;

+	return nullptr;

 }

 

 ////////////////////////////////////////////////////////////////////////////

@@ -1076,7 +1076,7 @@ INT_PTR GGPROTO::img_recvimage(WPARAM wParam, LPARAM lParam)
 //

 int gg_img_remove(GGIMAGEDLGDATA *dat)

 {

-	GGIMAGEENTRY *temp = NULL, *img = NULL;

+	GGIMAGEENTRY *temp = nullptr, *img = nullptr;

 	GGPROTO *gg;

 

 	if (!dat) return FALSE;

@@ -1129,7 +1129,7 @@ GGIMAGEDLGDATA* gg_img_find(GGPROTO *gg, uin_t uin, uint32_t crc32)
 	gg->gg_LeaveCriticalSection(&gg->img_mutex, "gg_img_find", 62, 2, "img_mutex", 1);

 

 	gg->debugLogA("gg_img_find(): Image not found on the list. It might be released before calling this function.");

-	return NULL;

+	return nullptr;

 }

 

 

@@ -1158,14 +1158,14 @@ BOOL GGPROTO::img_sendonrequest(gg_event* e)
 //

 INT_PTR GGPROTO::img_sendimg(WPARAM hContact, LPARAM)

 {

-	GGIMAGEDLGDATA *dat = NULL;

+	GGIMAGEDLGDATA *dat = nullptr;

 

 	gg_EnterCriticalSection(&img_mutex, "img_sendimg", 64, "img_mutex", 1);

 	if (!dat)

 	{

 		dat = (GGIMAGEDLGDATA *)calloc(1, sizeof(GGIMAGEDLGDATA));

 		dat->hContact = hContact;

-		dat->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

+		dat->hEvent = CreateEvent(nullptr, TRUE, FALSE, nullptr);

 		dat->gg = this;

 		ResetEvent(dat->hEvent);

 

@@ -1177,7 +1177,7 @@ INT_PTR GGPROTO::img_sendimg(WPARAM hContact, LPARAM)
 

 		while (WaitForSingleObjectEx(dat->hEvent, INFINITE, TRUE) != WAIT_OBJECT_0);

 		CloseHandle(dat->hEvent);

-		dat->hEvent = NULL;

+		dat->hEvent = nullptr;

 

 		list_add(&imagedlgs, dat, 0);

 	}

diff --git a/protocols/Gadu-Gadu/src/import.cpp b/protocols/Gadu-Gadu/src/import.cpp
index b2b686b4dc..d80dc75a35 100644
--- a/protocols/Gadu-Gadu/src/import.cpp
+++ b/protocols/Gadu-Gadu/src/import.cpp
@@ -22,7 +22,7 @@
 

 char *gg_makecontacts(GGPROTO *gg, int cr)

 {

-	string_t s = string_init(NULL);

+	string_t s = string_init(nullptr);

 	char *contacts;

 

 	// Readup contacts

@@ -125,7 +125,7 @@ char *strndup(char *str, int c)
 

 void GGPROTO::parsecontacts(char *contacts)

 {

-	char *p = strchr(contacts, ':'), *n = NULL;

+	char *p = strchr(contacts, ':'), *n = nullptr;

 	char *strFirstName, *strLastName, *strNickname, *strNick, *strPhone, *strGroup, *strUin, *strMail;

 	uin_t uin;

 

@@ -136,7 +136,7 @@ void GGPROTO::parsecontacts(char *contacts)
 	while(p)

 	{

 		// Processing line

-		strFirstName = strLastName = strNickname = strNick = strPhone = strGroup = strUin = strMail = NULL;

+		strFirstName = strLastName = strNickname = strNick = strPhone = strGroup = strUin = strMail = nullptr;

 		uin = 0;

 

 		// FirstName

@@ -205,7 +205,7 @@ void GGPROTO::parsecontacts(char *contacts)
 			n = strchr(p, '\n');

 			p = (n + 1);

 		}

-		if (!n) p = NULL;

+		if (!n) p = nullptr;

 

 		// Loadup contact

 		if (uin && strNick)

@@ -256,7 +256,7 @@ INT_PTR GGPROTO::import_server(WPARAM, LPARAM)
 	// Check if connected

 	if (!isonline())

 	{

-		MessageBox(NULL,

+		MessageBox(nullptr,

 			TranslateT("You have to be connected before you can import/export contacts from/to server."),

 			m_tszUserName, MB_OK | MB_ICONSTOP

 		);

@@ -274,12 +274,12 @@ INT_PTR GGPROTO::import_server(WPARAM, LPARAM)
 

 	// Making contacts list

 	gg_EnterCriticalSection(&sess_mutex, "import_server", 65, "sess_mutex", 1);

-	if (gg_userlist_request(sess, GG_USERLIST_GET, NULL) == -1)

+	if (gg_userlist_request(sess, GG_USERLIST_GET, nullptr) == -1)

 	{

 		wchar_t error[128];

 		gg_LeaveCriticalSection(&sess_mutex, "import_server", 65, 1, "sess_mutex", 1);

 		mir_snwprintf(error, TranslateT("List cannot be imported because of error:\n\t%s (Error: %d)"), ws_strerror(errno), errno);

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		debugLogW(L"import_server(): Cannot import list. errno:%d: %s", errno, ws_strerror(errno));

 	}

 	gg_LeaveCriticalSection(&sess_mutex, "import_server", 65, 2, "sess_mutex", 1);

@@ -294,7 +294,7 @@ INT_PTR GGPROTO::remove_server(WPARAM, LPARAM)
 {

 	// Check if connected

 	if (!isonline()) {

-		MessageBox(NULL,

+		MessageBox(nullptr,

 			TranslateT("You have to be connected before you can import/export contacts from/to server."),

 			m_tszUserName, MB_OK | MB_ICONSTOP

 		);

@@ -312,12 +312,12 @@ INT_PTR GGPROTO::remove_server(WPARAM, LPARAM)
 

 	// Making contacts list

 	gg_EnterCriticalSection(&sess_mutex, "remove_server", 66, "sess_mutex", 1);

-	if (gg_userlist_request(sess, GG_USERLIST_PUT, NULL) == -1)

+	if (gg_userlist_request(sess, GG_USERLIST_PUT, nullptr) == -1)

 	{

 		wchar_t error[128];

 		gg_LeaveCriticalSection(&sess_mutex, "remove_server", 66, 1, "sess_mutex", 1);

 		mir_snwprintf(error, TranslateT("List cannot be removed because of error: %s (Error: %d)"), ws_strerror(errno), errno);

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		debugLogW(L"remove_server(): Cannot remove list. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	gg_LeaveCriticalSection(&sess_mutex, "remove_server", 66, 2, "sess_mutex", 1);

@@ -384,14 +384,14 @@ INT_PTR GGPROTO::import_text(WPARAM, LPARAM)
 		parsecontacts(contacts);

 		mir_free(contacts);

 

-		MessageBox(NULL, TranslateT("List import successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

+		MessageBox(nullptr, TranslateT("List import successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

 		return 0;

 	}

 	else

 	{

 		wchar_t error[256];

 		mir_snwprintf(error, TranslateT("List cannot be imported from file \"%s\" because of error:\n\t%s (Error: %d)"), str, _tcserror(errno), errno);

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		debugLogW(L"import_text(): Cannot import list from file \"%s\". errno=%d: %s", str, errno, _tcserror(errno));

 		if (f)

 			fclose(f);

@@ -447,13 +447,13 @@ INT_PTR GGPROTO::export_text(WPARAM, LPARAM)
 		fclose(f);

 		free(contacts);

 

-		MessageBox(NULL, TranslateT("List export successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

+		MessageBox(nullptr, TranslateT("List export successful."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

 	}

 	else

 	{

 		wchar_t error[128];

 		mir_snwprintf(error, TranslateT("List cannot be exported to file \"%s\" because of error:\n\t%s (Error: %d)"), str, _tcserror(errno), errno);

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		debugLogW(L"export_text(): Cannot export list to file \"%s\". errno=%d: %s", str, errno, _tcserror(errno));

 	}

 

@@ -468,7 +468,7 @@ INT_PTR GGPROTO::export_server(WPARAM, LPARAM)
 	// Check if connected

 	if (!isonline())

 	{

-		MessageBox(NULL,

+		MessageBox(nullptr,

 			TranslateT("You have to be connected before you can import/export contacts from/to server."),

 			m_tszUserName, MB_OK | MB_ICONSTOP

 		);

@@ -497,7 +497,7 @@ INT_PTR GGPROTO::export_server(WPARAM, LPARAM)
 		wchar_t error[128];

 		gg_LeaveCriticalSection(&sess_mutex, "export_server", 67, 1, "sess_mutex", 1);

 		mir_snwprintf(error, TranslateT("List cannot be exported because of error:\n\t%s (Error: %d)"), ws_strerror(errno), errno);

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		debugLogW(L"export_server(): Cannot export list. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	gg_LeaveCriticalSection(&sess_mutex, "export_server", 67, 2, "sess_mutex", 1);

diff --git a/protocols/Gadu-Gadu/src/keepalive.cpp b/protocols/Gadu-Gadu/src/keepalive.cpp
index f55a224cb6..426f72d0f0 100644
--- a/protocols/Gadu-Gadu/src/keepalive.cpp
+++ b/protocols/Gadu-Gadu/src/keepalive.cpp
@@ -24,7 +24,7 @@
  * does not get full pointer but just 2 byte lower bytes.

  */

 #define MAX_TIMERS 8

-GGPROTO *g_timers[MAX_TIMERS] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};

+GGPROTO *g_timers[MAX_TIMERS] = {nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr};

 

 static VOID CALLBACK gg_keepalive(HWND, UINT, UINT_PTR idEvent, DWORD)

 {

@@ -55,13 +55,13 @@ void GGPROTO::keepalive_init()
 	if (getByte(GG_KEY_KEEPALIVE, GG_KEYDEF_KEEPALIVE))

 	{

 		int i;

-		for(i = 0; i < MAX_TIMERS && g_timers[i] != NULL; i++);

+		for(i = 0; i < MAX_TIMERS && g_timers[i] != nullptr; i++);

 		if (i < MAX_TIMERS)

 		{

 	#ifdef DEBUGMODE

 			debugLogA("keepalive_init(): Initializing Timer %d", i);

 	#endif

-			timer = SetTimer(NULL, 0, 1000 * 30, gg_keepalive);

+			timer = SetTimer(nullptr, 0, 1000 * 30, gg_keepalive);

 			g_timers[i] = this;

 		}

 	}

@@ -75,10 +75,10 @@ void GGPROTO::keepalive_destroy()
 	if (timer)

 	{

 		int i;

-		KillTimer(NULL, timer);

+		KillTimer(nullptr, timer);

 		for(i = 0; i < MAX_TIMERS; i++)

 			if (g_timers[i] == this) {

-				g_timers[i] = NULL;

+				g_timers[i] = nullptr;

 				break;

 			}

 		timer = 0;

diff --git a/protocols/Gadu-Gadu/src/links.cpp b/protocols/Gadu-Gadu/src/links.cpp
index 6fc1a996ca..6463c5ccf6 100644
--- a/protocols/Gadu-Gadu/src/links.cpp
+++ b/protocols/Gadu-Gadu/src/links.cpp
@@ -45,12 +45,12 @@ static INT_PTR gg_parselink(WPARAM, LPARAM lParam)
 	if (g_Instances.getCount() == 0)

 		return 0;

 

-	if (arg == NULL)

+	if (arg == nullptr)

 		return 1;

 

 	arg = strchr(arg, ':');

 

-	if (arg == NULL)

+	if (arg == nullptr)

 		return 1;

 

 	for (++arg; *arg == '/'; ++arg);

@@ -59,13 +59,13 @@ static INT_PTR gg_parselink(WPARAM, LPARAM lParam)
 	if (!uin)

 		return 1;

 

-	GGPROTO *gg = NULL;

+	GGPROTO *gg = nullptr;

 	for (int i=0; i < g_Instances.getCount(); i++) {

 		gg = g_Instances[i];

 

 		if (gg->m_iStatus > ID_STATUS_OFFLINE) {

 			++items;

-			Menu_ModifyItem(gg->hInstanceMenuItem, NULL, Skin_LoadProtoIcon(gg->m_szModuleName, gg->m_iStatus));

+			Menu_ModifyItem(gg->hInstanceMenuItem, nullptr, Skin_LoadProtoIcon(gg->m_szModuleName, gg->m_iStatus));

 		}

 		else Menu_ShowItem(gg->hInstanceMenuItem, false);

 	}

@@ -76,17 +76,17 @@ static INT_PTR gg_parselink(WPARAM, LPARAM lParam)
 

 		HMENU hMenu = CreatePopupMenu();

 		Menu_Build(hMenu, hInstanceMenu);

-		int cmd = TrackPopupMenu(hMenu, TPM_RETURNCMD, pt.x, pt.y, 0, pcli->hwndContactList, NULL);

+		int cmd = TrackPopupMenu(hMenu, TPM_RETURNCMD, pt.x, pt.y, 0, pcli->hwndContactList, nullptr);

 		DestroyMenu(hMenu);

 

 		if (cmd)

 			Menu_ProcessCommandById(cmd, (LPARAM)&gg);

 	}

 

-	if (gg == NULL)

+	if (gg == nullptr)

 		return 0;

 

-	MCONTACT hContact = gg->getcontact(uin, 1, 0, NULL);

+	MCONTACT hContact = gg->getcontact(uin, 1, 0, nullptr);

 	if (hContact != NULL)

 		CallService(MS_MSG_SENDMESSAGE, hContact, 0);

 	return 0;

@@ -95,13 +95,13 @@ static INT_PTR gg_parselink(WPARAM, LPARAM lParam)
 void gg_links_instancemenu_init()

 {

 	CreateServiceFunction(GGS_MENUCHOOSE, gg_menuchoose);

-	hInstanceMenu = Menu_AddObject("GGAccountChooser", LPGEN("Gadu-Gadu account chooser"), 0, GGS_MENUCHOOSE);

+	hInstanceMenu = Menu_AddObject("GGAccountChooser", LPGEN("Gadu-Gadu account chooser"), nullptr, GGS_MENUCHOOSE);

 

 	CMenuItem mi;

 	mi.name.a = "Cancel";

 	mi.position = 9999999;

 	mi.hIcolibItem = Skin_GetIconHandle(SKINICON_OTHER_DELETE);

-	Menu_AddItem(hInstanceMenu, &mi, NULL);

+	Menu_AddItem(hInstanceMenu, &mi, nullptr);

 }

 

 void gg_links_init()

diff --git a/protocols/Gadu-Gadu/src/oauth.cpp b/protocols/Gadu-Gadu/src/oauth.cpp
index 52074931a6..5c0f21cf74 100644
--- a/protocols/Gadu-Gadu/src/oauth.cpp
+++ b/protocols/Gadu-Gadu/src/oauth.cpp
@@ -57,7 +57,7 @@ char *oauth_uri_escape(const char *str)
 	char *res;

 	int size, ix = 0;

 

-	if (str == NULL) return mir_strdup("");

+	if (str == nullptr) return mir_strdup("");

 

 	size = (int)mir_strlen(str) + 1;

 	res = (char *)mir_alloc(size);

@@ -86,7 +86,7 @@ char *oauth_generate_signature(LIST<OAUTHPARAMETER> &params, const char *httpmet
 	OAUTHPARAMETER *p;

 	int i, ix = 0, size;

 

-	if (httpmethod == NULL || url == NULL || !params.getCount()) return mir_strdup("");

+	if (httpmethod == nullptr || url == nullptr || !params.getCount()) return mir_strdup("");

 

 	urlnorm = (char *)mir_alloc(mir_strlen(url) + 1);

 	while (*url) {

@@ -95,9 +95,9 @@ char *oauth_generate_signature(LIST<OAUTHPARAMETER> &params, const char *httpmet
 		url++;

 	}

 	urlnorm[ix] = 0;

-	if ((res = strstr(urlnorm, ":80")) != NULL)

+	if ((res = strstr(urlnorm, ":80")) != nullptr)

 		memmove(res, res + 3, mir_strlen(res) - 2);

-	else if ((res = strstr(urlnorm, ":443")) != NULL)

+	else if ((res = strstr(urlnorm, ":443")) != nullptr)

 		memmove(res, res + 4, mir_strlen(res) - 3);

 

 	urlenc = oauth_uri_escape(urlnorm);

@@ -135,7 +135,7 @@ char *oauth_getparam(LIST<OAUTHPARAMETER> &params, const char *name)
 	OAUTHPARAMETER *p;

 	int i;

 

-	if (name == NULL) return NULL;

+	if (name == nullptr) return nullptr;

 

 	for (i = 0; i < params.getCount(); i++) {

 		p = params[i];

@@ -143,7 +143,7 @@ char *oauth_getparam(LIST<OAUTHPARAMETER> &params, const char *name)
 			return p->value;

 	}

 

-	return NULL;

+	return nullptr;

 }

 

 void oauth_setparam(LIST<OAUTHPARAMETER> &params, const char *name, const char *value)

@@ -151,7 +151,7 @@ void oauth_setparam(LIST<OAUTHPARAMETER> &params, const char *name, const char *
 	OAUTHPARAMETER *p;

 	int i;

 

-	if (name == NULL) return;

+	if (name == nullptr) return;

 

 	for (i = 0; i < params.getCount(); i++) {

 		p = params[i];

@@ -183,12 +183,12 @@ void oauth_freeparams(LIST<OAUTHPARAMETER> &params)
 int oauth_sign_request(LIST<OAUTHPARAMETER> &params, const char *httpmethod, const char *url,

 					   const char *consumer_secret, const char *token_secret)

 {

-	char *sign = NULL, *signmethod;

+	char *sign = nullptr, *signmethod;

 

 	if (!params.getCount()) return -1;

 

 	signmethod = oauth_getparam(params, "oauth_signature_method");

-	if (signmethod == NULL) return -1;

+	if (signmethod == nullptr) return -1;

 

 	if (!mir_strcmp(signmethod, "HMAC-SHA1")) {

 		ptrA text( oauth_generate_signature(params, httpmethod, url));

@@ -224,7 +224,7 @@ char* oauth_generate_nonce()
 	char randnum[16];

 	Utils_GetRandom(randnum, sizeof(randnum));

 

-	CMStringA str(FORMAT, "%ld%s", time(NULL), randnum);

+	CMStringA str(FORMAT, "%ld%s", time(nullptr), randnum);

 

 	BYTE digest[16];

 	mir_md5_hash((BYTE*)str.GetString(), str.GetLength(), digest);

@@ -238,7 +238,7 @@ char *oauth_auth_header(const char *httpmethod, const char *url, OAUTHSIGNMETHOD
 	int i, size;

 	char *res, timestamp[22];

 

-	if (httpmethod == NULL || url == NULL) return NULL;

+	if (httpmethod == nullptr || url == nullptr) return nullptr;

 

 	LIST<OAUTHPARAMETER> oauth_parameters(1, paramsortFunc);

 	oauth_setparam(oauth_parameters, "oauth_consumer_key", consumer_key);

@@ -248,15 +248,15 @@ char *oauth_auth_header(const char *httpmethod, const char *url, OAUTHSIGNMETHOD
 		case RSASHA1: oauth_setparam(oauth_parameters, "oauth_signature_method", "RSA-SHA1"); break;

 		default: oauth_setparam(oauth_parameters, "oauth_signature_method", "PLAINTEXT"); break;

 	};

-	mir_snprintf(timestamp, "%ld", time(NULL)); 

+	mir_snprintf(timestamp, "%ld", time(nullptr)); 

 	oauth_setparam(oauth_parameters, "oauth_timestamp", timestamp);

 	oauth_setparam(oauth_parameters, "oauth_nonce", ptrA(oauth_generate_nonce()));

-	if (token != NULL && *token)

+	if (token != nullptr && *token)

 		oauth_setparam(oauth_parameters, "oauth_token", token);

 

 	if (oauth_sign_request(oauth_parameters, httpmethod, url, consumer_secret, token_secret)) {

 		oauth_freeparams(oauth_parameters);

-		return NULL;

+		return nullptr;

 	}

 

 	size = 7;

@@ -284,9 +284,9 @@ char *oauth_auth_header(const char *httpmethod, const char *url, OAUTHSIGNMETHOD
 

 int GGPROTO::oauth_receivetoken()

 {

-	char szUrl[256], uin[32], *str, *token = NULL, *token_secret = NULL;

+	char szUrl[256], uin[32], *str, *token = nullptr, *token_secret = nullptr;

 	int res = 0;

-	HNETLIBCONN nlc = NULL;

+	HNETLIBCONN nlc = nullptr;

 

 	UIN2IDA( getDword(GG_KEY_UIN, 0), uin);

 	char *password = getStringA(GG_KEY_PASSWORD);

@@ -294,7 +294,7 @@ int GGPROTO::oauth_receivetoken()
 	// 1. Obtaining an Unauthorized Request Token

 	debugLogA("oauth_receivetoken(): Obtaining an Unauthorized Request Token...");

 	mir_strcpy(szUrl, "http://api.gadu-gadu.pl/request_token");

-	str = oauth_auth_header("POST", szUrl, HMACSHA1, uin, password, NULL, NULL);

+	str = oauth_auth_header("POST", szUrl, HMACSHA1, uin, password, nullptr, nullptr);

 

 	NETLIBHTTPHEADER httpHeaders[3];

 	httpHeaders[0].szName   = "User-Agent";

@@ -316,13 +316,13 @@ int GGPROTO::oauth_receivetoken()
 		nlc = resp->nlc; 

 		if (resp->resultCode == 200 && resp->dataLength > 0 && resp->pData) {

 			wchar_t *xmlAction = mir_a2u(resp->pData);

-			HXML hXml = xmlParseString(xmlAction, 0, L"result");

-			if (hXml != NULL) {

+			HXML hXml = xmlParseString(xmlAction, nullptr, L"result");

+			if (hXml != nullptr) {

 				HXML node = xmlGetChildByPath(hXml, L"oauth_token", 0);

-				token = node != NULL ? mir_u2a(xmlGetText(node)) : NULL;

+				token = node != nullptr ? mir_u2a(xmlGetText(node)) : nullptr;

 

 				node = xmlGetChildByPath(hXml, L"oauth_token_secret", 0);

-				token_secret = node != NULL ? mir_u2a(xmlGetText(node)) : NULL;

+				token_secret = node != nullptr ? mir_u2a(xmlGetText(node)) : nullptr;

 

 				xmlDestroyNode(hXml);

 			}

@@ -369,8 +369,8 @@ int GGPROTO::oauth_receivetoken()
 	str = oauth_auth_header("POST", szUrl, HMACSHA1, uin, password, token, token_secret);

 	mir_free(token);

 	mir_free(token_secret);

-	token = NULL;

-	token_secret = NULL;

+	token = nullptr;

+	token_secret = nullptr;

 

 	memset(&req, 0, sizeof(req));

 	req.cbSize = sizeof(req);

@@ -387,8 +387,8 @@ int GGPROTO::oauth_receivetoken()
 	if (resp) {

 		if (resp->resultCode == 200 && resp->dataLength > 0 && resp->pData) {

 			wchar_t *xmlAction = mir_a2u(resp->pData);

-			HXML hXml = xmlParseString(xmlAction, 0, L"result");

-			if (hXml != NULL) {

+			HXML hXml = xmlParseString(xmlAction, nullptr, L"result");

+			if (hXml != nullptr) {

 				HXML node = xmlGetChildByPath(hXml, L"oauth_token", 0);

 				token = mir_u2a(xmlGetText(node));

 

@@ -408,7 +408,7 @@ int GGPROTO::oauth_receivetoken()
 	mir_free(password);

 	mir_free(str);

 

-	if (token != NULL && token_secret != NULL) {

+	if (token != nullptr && token_secret != nullptr) {

 		setString(GG_KEY_TOKEN, token);

 		setString(GG_KEY_TOKENSECRET, token_secret);

 		debugLogA("oauth_receivetoken(): Access Token obtained successfully.");

diff --git a/protocols/Gadu-Gadu/src/ownerinfo.cpp b/protocols/Gadu-Gadu/src/ownerinfo.cpp
index 6a11db6a33..49b70004f5 100644
--- a/protocols/Gadu-Gadu/src/ownerinfo.cpp
+++ b/protocols/Gadu-Gadu/src/ownerinfo.cpp
@@ -58,14 +58,14 @@ void __cdecl GGPROTO::remindpasswordthread(void *param)
 	{

 		wchar_t error[128];

 		mir_snwprintf(error, TranslateT("Password could not be reminded because of error:\n\t%s (Error: %d)"), ws_strerror(errno), errno);

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		debugLogW(L"remindpasswordthread(): Password could not be reminded. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	else

 	{

 		gg_pubdir_free(h);

 		debugLogA("remindpasswordthread(): Password remind successful.");

-		MessageBox(NULL, TranslateT("Password was sent to your e-mail."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

+		MessageBox(nullptr, TranslateT("Password was sent to your e-mail."), m_tszUserName, MB_OK | MB_ICONINFORMATION);

 	}

 

 	free(rp);

diff --git a/protocols/Gadu-Gadu/src/popups.cpp b/protocols/Gadu-Gadu/src/popups.cpp
index dcc88ee18c..a1527e3b46 100644
--- a/protocols/Gadu-Gadu/src/popups.cpp
+++ b/protocols/Gadu-Gadu/src/popups.cpp
@@ -38,7 +38,7 @@ LRESULT CALLBACK PopupWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lPar
 		case WM_COMMAND:

 		{

 			PopupData* puData = (PopupData*)PUGetPluginData(hWnd);

-			if (puData != NULL)

+			if (puData != nullptr)

 			{

 				if (puData->flags & GG_POPUP_MULTILOGON)

 					puData->gg->sessions_view(0, 0);

@@ -54,7 +54,7 @@ LRESULT CALLBACK PopupWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lPar
 		case UM_FREEPLUGINDATA:

 		{

 			PopupData* puData = (PopupData*)PUGetPluginData(hWnd);

-			if (puData != NULL && puData != (PopupData*)CALLSERVICE_NOTFOUND)

+			if (puData != nullptr && puData != (PopupData*)CALLSERVICE_NOTFOUND)

 			{

 				mir_free(puData->title);

 				mir_free(puData->text);

@@ -94,7 +94,7 @@ void GGPROTO::initpopups()
 	puc.colorBack = RGB(191, 0, 0); // Red

 	puc.colorText = RGB(255, 245, 225); // Yellow

 	puc.iSeconds = 60;

-	puc.hIcon = (HICON)LoadImage(NULL, IDI_WARNING, IMAGE_ICON, 0, 0, LR_SHARED);

+	puc.hIcon = (HICON)LoadImage(nullptr, IDI_WARNING, IMAGE_ICON, 0, 0, LR_SHARED);

 	mir_snwprintf(szDescr, L"%s/%s", m_tszUserName, TranslateT("Error"));

 	mir_snprintf(szName, "%s_%s", m_szModuleName, "Error");

 	hPopupError = Popup_RegisterClass(&puc);

@@ -129,19 +129,19 @@ void CALLBACK sttMainThreadCallback(PVOID dwParam)
 		BOOL bShow = TRUE;

 

 		if (puData->flags & GG_POPUP_ONCE) {

-			HWND hWnd = FindWindow(NULL, gg->m_tszUserName);

-			while (hWnd != NULL) {

-				if (FindWindowEx(hWnd, NULL, NULL, puData->text) != NULL) {

+			HWND hWnd = FindWindow(nullptr, gg->m_tszUserName);

+			while (hWnd != nullptr) {

+				if (FindWindowEx(hWnd, nullptr, nullptr, puData->text) != nullptr) {

 					bShow = FALSE;

 					break;

 				}

-				hWnd = FindWindowEx(NULL, hWnd, NULL, gg->m_tszUserName);

+				hWnd = FindWindowEx(nullptr, hWnd, nullptr, gg->m_tszUserName);

 			}

 		}

 

 		if (bShow) {

 			UINT uIcon = puData->flags & GG_POPUP_ERROR ? MB_ICONERROR : puData->flags & GG_POPUP_WARNING ? MB_ICONEXCLAMATION : MB_ICONINFORMATION;

-			MessageBox(NULL, puData->text, gg->m_tszUserName, MB_OK | uIcon);

+			MessageBox(nullptr, puData->text, gg->m_tszUserName, MB_OK | uIcon);

 		}

 	}

 	mir_free(puData->title);

diff --git a/protocols/Gadu-Gadu/src/services.cpp b/protocols/Gadu-Gadu/src/services.cpp
index 78542d1802..cd060f3609 100644
--- a/protocols/Gadu-Gadu/src/services.cpp
+++ b/protocols/Gadu-Gadu/src/services.cpp
@@ -38,7 +38,7 @@ char *gg_status2db(int status, const char *suffix)
 		case ID_STATUS_INVISIBLE:  prefix = "Inv"; break;

 		case ID_STATUS_ONTHEPHONE: prefix = "Otp"; break;

 		case ID_STATUS_OUTTOLUNCH: prefix = "Otl"; break;

-		default: return NULL;

+		default: return nullptr;

 	}

 

 	static char str[64];

@@ -95,11 +95,11 @@ int GGPROTO::refreshstatus(int status)
 		debugLogA("refreshstatus(): Waiting pth_sess thread - OK");

 		debugLogA("refreshstatus(): ForkThreadEx 21 GGPROTO::mainthread");

 #endif

-		pth_sess.hThread = ForkThreadEx(&GGPROTO::mainthread, NULL, &pth_sess.dwThreadId);

+		pth_sess.hThread = ForkThreadEx(&GGPROTO::mainthread, nullptr, &pth_sess.dwThreadId);

 	}

 	else

 	{

-		wchar_t *szMsg = NULL;

+		wchar_t *szMsg = nullptr;

 		// Select proper msg

 		gg_EnterCriticalSection(&modemsg_mutex, "refreshstatus", 69, "modemsg_mutex", 1);

 		szMsg = getstatusmsg(status);

@@ -118,7 +118,7 @@ int GGPROTO::refreshstatus(int status)
 			gg_LeaveCriticalSection(&sess_mutex, "refreshstatus", 71, 1, "sess_mutex", 1);

 		}

 		// Change status of the contact with our own UIN (if got yourself added to the contact list)

-		changecontactstatus( getDword(GG_KEY_UIN, 0), status_m2gg(status, szMsg != NULL), szMsg, 0, 0, 0, 0);

+		changecontactstatus( getDword(GG_KEY_UIN, 0), status_m2gg(status, szMsg != nullptr), szMsg, 0, 0, 0, 0);

 		broadcastnewstatus(status);

 	}

 

@@ -212,7 +212,7 @@ INT_PTR GGPROTO::getavatarinfo(WPARAM wParam, LPARAM lParam)
 

 	pai->format = getByte(pai->hContact, GG_KEY_AVATARTYPE, GG_KEYDEF_AVATARTYPE);

 

-	ptrA AvatarHash(NULL);

+	ptrA AvatarHash(nullptr);

 	ptrA AvatarURL( getStringA(pai->hContact, GG_KEY_AVATARURL));

 	ptrA AvatarTs( getStringA(pai->hContact, GG_KEY_AVATARTS));

 	if (AvatarURL != NULL && AvatarTs != NULL) {

@@ -287,7 +287,7 @@ INT_PTR GGPROTO::getmyavatar(WPARAM wParam, LPARAM lParam)
 	wchar_t *szFilename = (wchar_t*)wParam;

 	int len = (int)lParam;

 

-	if (szFilename == NULL || len <= 0) {

+	if (szFilename == nullptr || len <= 0) {

 		debugLogA("getmyavatar(): Incoming request for self avatar information. szFilename == NULL. return -1 (error)");

 		return -1;

 	}

@@ -319,8 +319,8 @@ INT_PTR GGPROTO::setmyavatar(WPARAM, LPARAM lParam)
 	if (!getByte(GG_KEY_ENABLEAVATARS, GG_KEYDEF_ENABLEAVATARS))

 		return -2;

 

-	if (szFilename == NULL) {

-		MessageBox(NULL, 

+	if (szFilename == nullptr) {

+		MessageBox(nullptr, 

 			TranslateT("To remove your Gadu-Gadu avatar, you must use the gg.pl website."),

 			m_tszUserName, MB_OK | MB_ICONINFORMATION);

 		return -1;

diff --git a/protocols/Gadu-Gadu/src/sessions.cpp b/protocols/Gadu-Gadu/src/sessions.cpp
index 724c2c9cef..f13ddecb2b 100644
--- a/protocols/Gadu-Gadu/src/sessions.cpp
+++ b/protocols/Gadu-Gadu/src/sessions.cpp
@@ -148,7 +148,7 @@ static BOOL IsOverAction(HWND hwndDlg)
 	return (hti.pt.x > textPosX && hti.pt.x < textPosX + textSize.cx);

 }

 

-static HCURSOR hHandCursor = NULL;

+static HCURSOR hHandCursor = nullptr;

 #define WM_MULTILOGONINFO (WM_USER + 10)

 #define HM_PROTOACK (WM_USER + 11)

 

@@ -172,8 +172,8 @@ static INT_PTR CALLBACK gg_sessions_viewdlg(HWND hwndDlg, UINT message, WPARAM w
 			SetWindowText(hwndDlg, newTitle);

 			Window_SetIcon_IcoLib(hwndDlg, GetIconHandle(IDI_SESSIONS));

 

-			if (hHandCursor == NULL)

-				hHandCursor = LoadCursor(NULL, IDC_HAND);

+			if (hHandCursor == nullptr)

+				hHandCursor = LoadCursor(nullptr, IDC_HAND);

 			hProtoAckEvent = HookEventMessage(ME_PROTO_ACK, hwndDlg, HM_PROTOACK);

 			SetWindowLongPtr(hwndDlg, GWLP_USERDATA, (LONG_PTR)hProtoAckEvent);

 

@@ -242,7 +242,7 @@ static INT_PTR CALLBACK gg_sessions_viewdlg(HWND hwndDlg, UINT message, WPARAM w
 							RECT rc;

 							HWND hwndHeader = ListView_GetHeader(nm->nmcd.hdr.hwndFrom);

 							GetClientRect(nm->nmcd.hdr.hwndFrom, &rc);

-							if (hwndHeader != NULL) {

+							if (hwndHeader != nullptr) {

 								RECT rcHeader;

 								GetClientRect(hwndHeader, &rcHeader);

 								rc.top += rcHeader.bottom;

@@ -251,7 +251,7 @@ static INT_PTR CALLBACK gg_sessions_viewdlg(HWND hwndDlg, UINT message, WPARAM w
 							SIZE textSize;

 							GetTextExtentPoint32(nm->nmcd.hdc, szText, cbLen, &textSize);

 							int textPosX = rc.left + (((rc.right - rc.left) - textSize.cx) / 2);

-							ExtTextOut(nm->nmcd.hdc, textPosX, rc.top + textSize.cy, ETO_OPAQUE, &rc, szText, cbLen, NULL);

+							ExtTextOut(nm->nmcd.hdc, textPosX, rc.top + textSize.cy, ETO_OPAQUE, &rc, szText, cbLen, nullptr);

 						}

 						// FALL THROUGH

 

@@ -316,7 +316,7 @@ static INT_PTR CALLBACK gg_sessions_viewdlg(HWND hwndDlg, UINT message, WPARAM w
 				hMenu = CreatePopupMenu();

 				AppendMenu(hMenu, MFT_STRING, 10001, TranslateT("Copy Text"));

 				AppendMenu(hMenu, MFT_STRING, 10002, TranslateT("Whois"));

-				iSelection = TrackPopupMenu(hMenu, TPM_RIGHTBUTTON | TPM_RETURNCMD, pt.x, pt.y, 0, hwndDlg, NULL);

+				iSelection = TrackPopupMenu(hMenu, TPM_RIGHTBUTTON | TPM_RETURNCMD, pt.x, pt.y, 0, hwndDlg, nullptr);

 				switch (iSelection) {

 				case 10001:

 					{

@@ -331,7 +331,7 @@ static INT_PTR CALLBACK gg_sessions_viewdlg(HWND hwndDlg, UINT message, WPARAM w
 						ListView_GetItemText(hList, lvhti.iItem, 1, szIP, _countof(szIP));

 						ListView_GetItemText(hList, lvhti.iItem, 2, szLoginTime, _countof(szLoginTime));

 						mir_snwprintf(szText, L"%s\t%s\t%s", szClientName, szIP, szLoginTime);

-						if ((hData = GlobalAlloc(GMEM_MOVEABLE, mir_wstrlen(szText) + 1)) != NULL)

+						if ((hData = GlobalAlloc(GMEM_MOVEABLE, mir_wstrlen(szText) + 1)) != nullptr)

 						{

 							mir_wstrcpy((wchar_t*)GlobalLock(hData), szText);

 							GlobalUnlock(hData);

@@ -382,7 +382,7 @@ static INT_PTR CALLBACK gg_sessions_viewdlg(HWND hwndDlg, UINT message, WPARAM w
 		{

 			HANDLE hProtoAckEvent = (HANDLE)GetWindowLongPtr(hwndDlg, GWLP_USERDATA);

 			if (hProtoAckEvent) UnhookEvent(hProtoAckEvent);

-			gg->hwndSessionsDlg = NULL;

+			gg->hwndSessionsDlg = nullptr;

 			Window_FreeIcon_IcoLib(hwndDlg);

 			break;

 		}

@@ -397,7 +397,7 @@ INT_PTR GGPROTO::sessions_view(WPARAM, LPARAM)
 		SetForegroundWindow(hwndSessionsDlg);

 		SetFocus(hwndSessionsDlg);

 	}

-	else CreateDialogParam(hInstance, MAKEINTRESOURCE(IDD_SESSIONS), NULL, gg_sessions_viewdlg, (LPARAM)this);

+	else CreateDialogParam(hInstance, MAKEINTRESOURCE(IDD_SESSIONS), nullptr, gg_sessions_viewdlg, (LPARAM)this);

 	return 0;

 }

 

diff --git a/protocols/Gadu-Gadu/src/token.cpp b/protocols/Gadu-Gadu/src/token.cpp
index 351b0df053..be13895b5d 100644
--- a/protocols/Gadu-Gadu/src/token.cpp
+++ b/protocols/Gadu-Gadu/src/token.cpp
@@ -76,7 +76,7 @@ INT_PTR CALLBACK gg_tokendlgproc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM l
 

 			if (dat && dat->hBitmap)

 			{

-				HDC hdcBmp = NULL;

+				HDC hdcBmp = nullptr;

 				int nWidth, nHeight;

 				BITMAP bmp;

 

@@ -115,7 +115,7 @@ int GGPROTO::gettoken(GGTOKEN *token)
 	if (!h || gg_token_watch_fd(h) || h->state == GG_STATE_ERROR || h->state != GG_STATE_DONE) {

 		wchar_t error[128];

 		mir_snwprintf(error, TranslateT("Token retrieval failed because of error:\n\t%s"), http_error_string(h ? h->error : 0));

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg_free_pubdir(h);

 		return FALSE;

 	}

@@ -124,7 +124,7 @@ int GGPROTO::gettoken(GGTOKEN *token)
 	if (!t || !h->body) {

 		wchar_t error[128];

 		mir_snwprintf(error, TranslateT("Token retrieval failed because of error:\n\t%s"), http_error_string(h->error));

-		MessageBox(NULL, error, m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg_free_pubdir(h);

 		return FALSE;

 	}

@@ -142,15 +142,15 @@ int GGPROTO::gettoken(GGTOKEN *token)
 	memio.fif = FIF_UNKNOWN; /* detect */

 	memio.flags = 0;

 	dat.hBitmap = (HBITMAP) CallService(MS_IMG_LOADFROMMEM, (WPARAM) &memio, 0);

-	if (dat.hBitmap == NULL)

+	if (dat.hBitmap == nullptr)

 	{

-		MessageBox(NULL, TranslateT("Could not load token image."), m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, TranslateT("Could not load token image."), m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg_free_pubdir(h);

 		return FALSE;

 	}

 

 	// Load token dialog

-	if (DialogBoxParam(hInstance, MAKEINTRESOURCE(IDD_TOKEN), NULL, gg_tokendlgproc, (LPARAM)&dat) == IDCANCEL)

+	if (DialogBoxParam(hInstance, MAKEINTRESOURCE(IDD_TOKEN), nullptr, gg_tokendlgproc, (LPARAM)&dat) == IDCANCEL)

 		return FALSE;

 

 	// Fillup patterns

diff --git a/protocols/Gadu-Gadu/src/userutils.cpp b/protocols/Gadu-Gadu/src/userutils.cpp
index 6fea4ce96e..8136cd8552 100644
--- a/protocols/Gadu-Gadu/src/userutils.cpp
+++ b/protocols/Gadu-Gadu/src/userutils.cpp
@@ -26,24 +26,24 @@
 void *gg_doregister(GGPROTO *gg, char *newPass, char *newEmail)

 {

 	// Connection handles

-	struct gg_http *h = NULL;

-	struct gg_pubdir *s = NULL;

+	struct gg_http *h = nullptr;

+	struct gg_pubdir *s = nullptr;

 	GGTOKEN token;

 

 #ifdef DEBUGMODE

 	gg->debugLogA("gg_doregister(): Starting.");

 #endif

-	if (!newPass || !newEmail) return NULL;

+	if (!newPass || !newEmail) return nullptr;

 

 	// Load token

-	if (!gg->gettoken(&token)) return NULL;

+	if (!gg->gettoken(&token)) return nullptr;

 

 	if (!(h = gg_register3(newEmail, newPass, token.id, token.val, 0)) || !(s = (gg_pubdir*)h->data) || !s->success || !s->uin) {

 		wchar_t error[128];

 		mir_snwprintf(error, TranslateT("Cannot register new account because of error:\n\t%s"),

 			(h && !s) ? http_error_string(h->error) :

 			(s ? TranslateT("Registration rejected") : ws_strerror(errno)));

-		MessageBox(NULL, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg->debugLogW(L"gg_doregister(): Cannot register. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	else {

@@ -53,7 +53,7 @@ void *gg_doregister(GGPROTO *gg, char *newPass, char *newEmail)
 		gg->setString(GG_KEY_EMAIL, newEmail);

 		gg_pubdir_free(h);

 		gg->debugLogA("gg_doregister(): Account registration succesful.");

-		MessageBox( NULL, 

+		MessageBox( nullptr, 

 			TranslateT("You have registered new account.\nPlease fill up your personal details in \"Main menu -> View/change my details...\""),

 			gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

 	}

@@ -62,7 +62,7 @@ void *gg_doregister(GGPROTO *gg, char *newPass, char *newEmail)
 	gg->debugLogA("gg_doregister(): End.");

 #endif

 

-	return NULL;

+	return nullptr;

 }

 

 ////////////////////////////////////////////////////////////////////////////////

@@ -72,16 +72,16 @@ void *gg_dounregister(GGPROTO *gg, uin_t uin, char *password)
 {

 	// Connection handles

 	struct gg_http *h;

-	struct gg_pubdir *s = NULL;

+	struct gg_pubdir *s = nullptr;

 	GGTOKEN token;

 

 #ifdef DEBUGMODE

 	gg->debugLogA("gg_dounregister(): Starting.");

 #endif

-	if (!uin || !password) return NULL;

+	if (!uin || !password) return nullptr;

 

 	// Load token

-	if (!gg->gettoken(&token)) return NULL;

+	if (!gg->gettoken(&token)) return nullptr;

 

 	if (!(h = gg_unregister3(uin, password, token.id, token.val, 0)) || !(s = (gg_pubdir*)h->data) || !s->success || s->uin != uin)

 	{

@@ -89,7 +89,7 @@ void *gg_dounregister(GGPROTO *gg, uin_t uin, char *password)
 		mir_snwprintf(error, TranslateT("Your account cannot be removed because of error:\n\t%s"),

 			(h && !s) ? http_error_string(h->error) :

 			(s ? TranslateT("Bad number or password") : ws_strerror(errno)));

-		MessageBox(NULL, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg->debugLogW(L"gg_dounregister(): Cannot remove account. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	else

@@ -98,14 +98,14 @@ void *gg_dounregister(GGPROTO *gg, uin_t uin, char *password)
 		gg->delSetting(GG_KEY_PASSWORD);

 		gg->delSetting(GG_KEY_UIN);

 		gg->debugLogA("gg_dounregister(): Account %d has been removed.", uin);

-		MessageBox(NULL, TranslateT("Your account has been removed."), gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

+		MessageBox(nullptr, TranslateT("Your account has been removed."), gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

 	}

 

 #ifdef DEBUGMODE

 	gg->debugLogA("gg_dounregister(): End.");

 #endif

 

-	return NULL;

+	return nullptr;

 }

 

 ////////////////////////////////////////////////////////////////////////////////

@@ -117,13 +117,13 @@ void *gg_dochpass(GGPROTO *gg, uin_t uin, char *password, char *newPass)
 	char email[255] = "\0"; DBVARIANT dbv_email;

 	// Connection handles

 	struct gg_http *h;

-	struct gg_pubdir *s = NULL;

+	struct gg_pubdir *s = nullptr;

 	GGTOKEN token;

 

 #ifdef DEBUGMODE

 	gg->debugLogA("gg_dochpass(): Starting.");

 #endif

-	if (!uin || !password || !newPass) return NULL;

+	if (!uin || !password || !newPass) return nullptr;

 

 	if (!gg->getString(GG_KEY_EMAIL, &dbv_email)) 

 	{

@@ -133,7 +133,7 @@ void *gg_dochpass(GGPROTO *gg, uin_t uin, char *password, char *newPass)
 

 	// Load token

 	if (!gg->gettoken(&token))

-		return NULL;

+		return nullptr;

 

 	if (!(h = gg_change_passwd4(uin, email, password, newPass, token.id, token.val, 0)) || !(s = (gg_pubdir*)h->data) || !s->success)

 	{

@@ -141,7 +141,7 @@ void *gg_dochpass(GGPROTO *gg, uin_t uin, char *password, char *newPass)
 		mir_snwprintf(error, TranslateT("Your password cannot be changed because of error:\n\t%s"),

 			(h && !s) ? http_error_string(h->error) :

 			(s ? TranslateT("Invalid data entered") : ws_strerror(errno)));

-		MessageBox(NULL, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg->debugLogW(L"gg_dochpass(): Cannot change password. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	else

@@ -149,14 +149,14 @@ void *gg_dochpass(GGPROTO *gg, uin_t uin, char *password, char *newPass)
 		gg_pubdir_free(h);

 		gg->setString(GG_KEY_PASSWORD, newPass);

 		gg->debugLogA("gg_dochpass(): Password change succesful.");

-		MessageBox(NULL, TranslateT("Your password has been changed."), gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

+		MessageBox(nullptr, TranslateT("Your password has been changed."), gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

 	}

 

 #ifdef DEBUGMODE

 	gg->debugLogA("gg_dochpass(): End.");

 #endif

 

-	return NULL;

+	return nullptr;

 }

 

 ////////////////////////////////////////////////////////////////////////////////

@@ -167,22 +167,22 @@ void *gg_dochemail(GGPROTO *gg, uin_t uin, char *password, char *email, char *ne
 #ifdef DEBUGMODE

 	gg->debugLogA("gg_dochemail(): Starting.");

 #endif

-	if (!uin || !email || !newEmail) return NULL;

+	if (!uin || !email || !newEmail) return nullptr;

 

 	// Load token

 	GGTOKEN token;

 	if (!gg->gettoken(&token))

-		return NULL;

+		return nullptr;

 

 	// Connection handles

-	struct gg_pubdir *s = NULL;

+	struct gg_pubdir *s = nullptr;

 	struct gg_http *h = gg_change_passwd4(uin, newEmail, password, password, token.id, token.val, 0);

 	if (!h || !(s = (gg_pubdir*)h->data) || !s->success)

 	{

 		wchar_t error[128];

 		mir_snwprintf(error, TranslateT("Your e-mail cannot be changed because of error:\n\t%s"),

 			(h && !s) ? http_error_string(h->error) : (s ? TranslateT("Bad old e-mail or password") : ws_strerror(errno)));

-		MessageBox(NULL, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

+		MessageBox(nullptr, error, gg->m_tszUserName, MB_OK | MB_ICONSTOP);

 		gg->debugLogW(L"gg_dochemail(): Cannot change e-mail. errno=%d: %s", errno, ws_strerror(errno));

 	}

 	else

@@ -190,14 +190,14 @@ void *gg_dochemail(GGPROTO *gg, uin_t uin, char *password, char *email, char *ne
 		gg_pubdir_free(h);

 		gg->setString(GG_KEY_EMAIL, newEmail);

 		gg->debugLogA("gg_dochemail(): E-mail change succesful.");

-		MessageBox(NULL, TranslateT("Your e-mail has been changed."), gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

+		MessageBox(nullptr, TranslateT("Your e-mail has been changed."), gg->m_tszUserName, MB_OK | MB_ICONINFORMATION);

 	}

 

 #ifdef DEBUGMODE

 	gg->debugLogA("gg_dochemail(): End.");

 #endif

 

-	return NULL;

+	return nullptr;

 }

 

 ////////////////////////////////////////////////////////////////////////////////