/* Popup Plus plugin for Miranda IM Copyright © 2002 Luca Santarelli, © 2004-2007 Victor Pavlychko © 2010 MPK © 2010 Merlin_de This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "headers.h" static volatile bool gPreviewOk = false; static PopupWnd2 *wndPreview = NULL; INT_PTR CALLBACK BoxPreviewWndProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam); void RegisterOptPrevBox() { DWORD err; WNDCLASSEX wcl; wcl.cbSize = sizeof(wcl); wcl.lpfnWndProc = (WNDPROC)BoxPreviewWndProc; wcl.style = CS_DROPSHADOW; wcl.cbClsExtra = 0; wcl.cbWndExtra = 0; wcl.hInstance = hInst; wcl.hIcon = NULL; wcl.hCursor = LoadCursor(NULL, IDC_ARROW); wcl.hbrBackground = NULL; // (HBRUSH)GetStockObject(LTGRAY_BRUSH); wcl.lpszMenuName = NULL; wcl.lpszClassName = _T(BOXPREVIEW_WNDCLASS); wcl.hIconSm = (HICON)LoadImage(hInst, MAKEINTRESOURCE(IDI_POPUP), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), LR_DEFAULTCOLOR); g_wndClass.cPopupPreviewBoxWndclass = RegisterClassEx(&wcl); err = GetLastError(); if (!g_wndClass.cPopupPreviewBoxWndclass) { TCHAR msg[1024]; mir_sntprintf(msg, SIZEOF(msg), TranslateT("Failed to register %s class."), wcl.lpszClassName); MSGERROR(msg); } // register custom class for dialog box with drop-shadow attribute // "#32770" stays for class name of default system dialog box GetClassInfoEx(hInst, _T("#32770"), &wcl); wcl.hInstance = hInst; wcl.lpszClassName = _T("PopupPlusDlgBox"); wcl.style |= CS_DROPSHADOW; g_wndClass.cPopupPlusDlgBox = RegisterClassEx(&wcl); err = GetLastError(); if (!g_wndClass.cPopupPlusDlgBox) { TCHAR msg[1024]; mir_sntprintf(msg, SIZEOF(msg), TranslateT("Failed to register %s class."), wcl.lpszClassName); MSGERROR(msg); } } static void updatePreviewImage(HWND hwndBox) { gPreviewOk = false; POPUPDATA2 ppd; memset(&ppd, 0, sizeof(ppd)); ppd.cbSize = sizeof(ppd); ppd.flags = PU2_TCHAR; ppd.lchIcon = LoadSkinnedIcon(SKINICON_STATUS_ONLINE); ppd.lptzTitle = TranslateT("Skin preview"); ppd.lptzText = TranslateT("Just take a look at this skin... ;)"); POPUPOPTIONS customOptions = PopupOptions; customOptions.DynamicResize = FALSE; customOptions.MinimumWidth = customOptions.MaximumWidth = 250; if (wndPreview) delete wndPreview; wndPreview = new PopupWnd2(&ppd, &customOptions, true); wndPreview->buildMText(); wndPreview->update(); gPreviewOk = true; InvalidateRect(hwndBox, NULL, TRUE); } static void DrawPreview(HWND hwnd, HDC hdc) { BITMAPINFO bi; bi.bmiHeader.biSize = sizeof(bi.bmiHeader); bi.bmiHeader.biWidth = 8; bi.bmiHeader.biHeight = -8; bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biBitCount = 32; bi.bmiHeader.biCompression = BI_RGB; HBITMAP hBmpBrush = CreateDIBSection(0, &bi, DIB_RGB_COLORS, 0, 0, 0); HDC dcBmp = CreateCompatibleDC(0); HBITMAP hBmpSave = (HBITMAP)SelectObject(dcBmp, hBmpBrush); HBRUSH hbr = CreateSolidBrush(RGB(0xcc, 0xcc, 0xcc)); RECT rc; SetRect(&rc, 0, 0, 8, 8); FillRect(dcBmp, &rc, hbr); DeleteObject(hbr); hbr = CreateSolidBrush(RGB(0xff, 0xff, 0xff)); SetRect(&rc, 4, 0, 8, 4); FillRect(dcBmp, &rc, hbr); SetRect(&rc, 0, 4, 4, 8); FillRect(dcBmp, &rc, hbr); DeleteObject(hbr); SelectObject(dcBmp, hBmpSave); DeleteDC(dcBmp); GetClientRect(hwnd, &rc); hbr = CreatePatternBrush(hBmpBrush); SetBrushOrgEx(hdc, 1, 1, 0); FillRect(hdc, &rc, hbr); DeleteObject(hbr); DeleteObject(hBmpBrush); if (gPreviewOk) { int width = min(rc.right, wndPreview->getContent()->getWidth()); int height = min(rc.bottom, wndPreview->getContent()->getHeight()); int left = (rc.right - width) / 2; int top = (rc.bottom - height) / 2; BLENDFUNCTION bf; bf.BlendOp = AC_SRC_OVER; bf.BlendFlags = 0; bf.SourceConstantAlpha = 255; bf.AlphaFormat = AC_SRC_ALPHA; AlphaBlend(hdc, left, top, width, height, wndPreview->getContent()->getDC(), 0, 0, width, height, bf); } FrameRect(hdc, &rc, GetStockBrush(LTGRAY_BRUSH)); } LRESULT CALLBACK WndProcPreviewBox(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { if (!wndPreview) return mir_callNextSubclass(hwnd, WndProcPreviewBox, msg, wParam, lParam); switch (msg) { case WM_PAINT: if (GetUpdateRect(hwnd, 0, FALSE)) { PAINTSTRUCT ps; HDC hdc = BeginPaint(hwnd, &ps); DrawPreview(hwnd, hdc); EndPaint(hwnd, &ps); return 0; } case WM_PRINT: case WM_PRINTCLIENT: HDC hdc = (HDC)wParam; DrawPreview(hwnd, hdc); return 0; } return mir_callNextSubclass(hwnd, WndProcPreviewBox, msg, wParam, lParam); } int SkinOptionList_AddSkin(OPTTREE_OPTION* &options, int *OptionsCount, int pos, DWORD *dwGlobalOptions) { const PopupSkin *skin = 0; if (skin = skins.getSkin(PopupOptions.SkinPack)) { for (int i = 1; i <= 10; i++) { if (!skin->getFlagName(i)) continue; *OptionsCount += 1; options = (OPTTREE_OPTION*)mir_realloc(options, sizeof(OPTTREE_OPTION)*(*OptionsCount)); options[pos].dwFlag = (DWORD)(1 << (i - 1)); options[pos].groupId = OPTTREE_CHECK; options[pos].iconIndex = 0; options[pos].pszSettingName = mir_tstrdup(_T("Skin options")); options[pos].pszOptionName = (LPTSTR)mir_alloc(sizeof(TCHAR)*( mir_tstrlen(options[pos].pszSettingName) + mir_strlen(skin->getFlagName(i)) + 10)); wsprintf(options[pos].pszOptionName, _T("%s/%hs"), options[pos].pszSettingName, skin->getFlagName(i)); // !!!!!!!!!!!!! options[pos].bState = skin->getFlag(i) ? TRUE : FALSE; options[pos].Data = i; // skin flag index *dwGlobalOptions |= skin->getFlag(i) ? (1 << (i - 1)) : 0; pos++; } } return pos; } ///////////////////////////////////////////////////////////////////////////////////////// static LPTSTR mainOption[] = { LPGENT("Show clock"), LPGENT("Drop shadow effect"), LPGENT("Drop shadow effect")_T("/")LPGENT("non rectangular"), LPGENT("Enable Aero Glass (Vista+)"), LPGENT("Use Windows colors"), LPGENT("Use advanced text render") }; int SkinOptionList_AddMain(OPTTREE_OPTION* &options, int *OptionsCount, int pos, DWORD *dwGlobalOptions) { for (int i = 0; i < SIZEOF(mainOption); i++) { BOOL bCheck = 0; switch (i) { case 0: *dwGlobalOptions |= PopupOptions.DisplayTime ? (1 << i) : 0; bCheck = PopupOptions.DisplayTime; break; case 1: *dwGlobalOptions |= PopupOptions.DropShadow ? (1 << i) : 0; bCheck = PopupOptions.DropShadow; break; case 2: *dwGlobalOptions |= PopupOptions.EnableFreeformShadows ? (1 << i) : 0; bCheck = PopupOptions.EnableFreeformShadows; break; case 3: if (!MyDwmEnableBlurBehindWindow) continue; *dwGlobalOptions |= PopupOptions.EnableAeroGlass ? (1 << i) : 0; bCheck = PopupOptions.EnableAeroGlass; break; case 4: *dwGlobalOptions |= PopupOptions.UseWinColors ? (1 << i) : 0; bCheck = PopupOptions.UseWinColors; break; case 5: if (!(htuText&&htuTitle)) continue; *dwGlobalOptions |= PopupOptions.UseMText ? (1 << i) : 0; bCheck = PopupOptions.UseMText; break; } *OptionsCount += 1; options = (OPTTREE_OPTION*)mir_realloc(options, sizeof(OPTTREE_OPTION)*(*OptionsCount)); options[pos].dwFlag = (1 << i); options[pos].groupId = OPTTREE_CHECK; options[pos].iconIndex = 0; options[pos].pszSettingName = mir_tstrdup(LPGENT("Global settings")); options[pos].pszOptionName = (LPTSTR)mir_alloc(sizeof(TCHAR)*( mir_tstrlen(options[pos].pszSettingName) + mir_tstrlen(mainOption[i]) + 10)); wsprintf(options[pos].pszOptionName, _T("%s/%s"), options[pos].pszSettingName, mainOption[i]); // !!!!!!!!!!!!! options[pos].bState = bCheck; pos++; } return pos; } bool SkinOptionList_Update(OPTTREE_OPTION* &options, int *OptionsCount, HWND hwndDlg) { if (options) { int index = -1; OptTree_ProcessMessage(hwndDlg, WM_DESTROY, 0, 0, &index, IDC_SKIN_LIST_OPT, options, *OptionsCount); for (int i = 0; i < *OptionsCount; ++i) { mir_free(options[i].pszOptionName); mir_free(options[i].pszSettingName); } mir_free(options); options = NULL; *OptionsCount = 0; } // add "Global options" DWORD dwGlobalOptions = 0; int pos = SkinOptionList_AddMain(options, OptionsCount, 0, &dwGlobalOptions); // add "Skin options" DWORD dwSkinOptions = 0; pos = SkinOptionList_AddSkin(options, OptionsCount, pos, &dwSkinOptions); // generate treeview int index = -1; OptTree_ProcessMessage(hwndDlg, WM_INITDIALOG, 0, 0, &index, IDC_SKIN_LIST_OPT, options, *OptionsCount); // check "Skin options" state char prefix[128]; mir_snprintf(prefix, SIZEOF(prefix), "skin.%S", PopupOptions.SkinPack); OptTree_SetOptions(hwndDlg, IDC_SKIN_LIST_OPT, options, *OptionsCount, db_get_dw(NULL, MODULNAME, prefix, dwSkinOptions), _T("Skin options")); // check "Global Settings" OptTree_SetOptions(hwndDlg, IDC_SKIN_LIST_OPT, options, *OptionsCount, dwGlobalOptions, _T("Global settings")); return true; } void LoadOption_Skins() { // skin pack PopupOptions.SkinPack = (LPTSTR)DBGetContactSettingStringX(NULL, MODULNAME, "SkinPack", "* Popup Classic", DBVT_TCHAR); // more Skin options PopupOptions.DisplayTime = db_get_b(NULL, MODULNAME, "DisplayTime", TRUE); PopupOptions.DropShadow = db_get_b(NULL, MODULNAME, "DropShadow", TRUE); PopupOptions.EnableFreeformShadows = db_get_b(NULL, MODULNAME, "EnableShadowRegion", 1); PopupOptions.EnableAeroGlass = db_get_b(NULL, MODULNAME, "EnableAeroGlass", 1); PopupOptions.UseWinColors = db_get_b(NULL, MODULNAME, "UseWinColors", FALSE); PopupOptions.UseMText = db_get_b(NULL, MODULNAME, "UseMText", TRUE); } INT_PTR CALLBACK DlgProcPopSkinsOpts(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam) { static bool bDlgInit = false; // some controls send WM_COMMAND before or during WM_INITDIALOG static HANDLE hhkFontsReload = 0; static OPTTREE_OPTION *skinOptions = NULL; static int skinOptionsCount = 0; if (skinOptions) { int index = -1; OptTree_ProcessMessage(hwndDlg, msg, wParam, lParam, &index, IDC_SKIN_LIST_OPT, skinOptions, skinOptionsCount); if (index != -1) { if (mir_tstrcmp(skinOptions[index].pszSettingName, _T("Skin options")) == 0) { const PopupSkin *skin = 0; if (skin = skins.getSkin(PopupOptions.SkinPack)) { skin->setFlag(skinOptions[index].Data, skinOptions[index].bState ? true : false); } } else if (mir_tstrcmp(skinOptions[index].pszSettingName, _T("Global settings")) == 0) { switch (skinOptions[index].dwFlag) { case (1 << 0) : PopupOptions.DisplayTime = skinOptions[index].bState; break; case (1 << 1) : PopupOptions.DropShadow = skinOptions[index].bState; break; case (1 << 2) : PopupOptions.EnableFreeformShadows = skinOptions[index].bState; break; case (1 << 3) : PopupOptions.EnableAeroGlass = skinOptions[index].bState; break; case (1 << 4) : PopupOptions.UseWinColors = skinOptions[index].bState; break; case (1 << 5) : PopupOptions.UseMText = skinOptions[index].bState; break; } } updatePreviewImage(GetDlgItem(hwndDlg, IDC_PREVIEWBOX)); return FALSE; } } switch (msg) { case WM_INITDIALOG: { // Skin List HWND hCtrl = GetDlgItem(hwndDlg, IDC_SKINLIST); ListBox_ResetContent(hCtrl); for (const Skins::SKINLIST *sl = skins.getSkinList(); sl; sl = sl->next) { DWORD dwIndex = ListBox_AddString(hCtrl, sl->name); ListBox_SetItemData(hCtrl, dwIndex, sl->name); } ListBox_SetCurSel(hCtrl, ListBox_FindString(hCtrl, 0, PopupOptions.SkinPack)); // Skin List reload button SendDlgItemMessage(hwndDlg, IDC_BTN_RELOAD, BUTTONSETASFLATBTN, TRUE, 0); SendDlgItemMessage(hwndDlg, IDC_BTN_RELOAD, BM_SETIMAGE, IMAGE_ICON, (LPARAM)IcoLib_GetIcon(ICO_OPT_RELOAD, 0)); SendDlgItemMessage(hwndDlg, IDC_BTN_RELOAD, BUTTONADDTOOLTIP, (WPARAM)Translate("Refresh List"), 0); // Skin Option List SkinOptionList_Update(skinOptions, &skinOptionsCount, hwndDlg); // PreviewBox mir_subclassWindow(GetDlgItem(hwndDlg, IDC_PREVIEWBOX), WndProcPreviewBox); updatePreviewImage(GetDlgItem(hwndDlg, IDC_PREVIEWBOX)); // hooks hhkFontsReload = HookEventMessage(ME_FONT_RELOAD, hwndDlg, WM_USER); TranslateDialogDefault(hwndDlg); bDlgInit = true; } return TRUE; case WM_USER: updatePreviewImage(GetDlgItem(hwndDlg, IDC_PREVIEWBOX)); return TRUE; case WM_COMMAND: { HWND hCtrl = NULL; UINT idCtrl = LOWORD(wParam); switch (HIWORD(wParam)) { case BN_KILLFOCUS: // Button controls case BN_SETFOCUS: // Button controls return TRUE; case BN_CLICKED: // Button controls switch (idCtrl) { case IDC_PREVIEW: PopupPreview(); break; case IDC_GETSKINS: CallService(MS_UTILS_OPENURL, 0, (LPARAM)"http://miranda-ng.org/addons/category/13"); break; case IDC_BTN_RELOAD: LPTSTR pszOldSkin = NEWTSTR_ALLOCA(PopupOptions.SkinPack); skins.load(); hCtrl = GetDlgItem(hwndDlg, IDC_SKINLIST); ListBox_ResetContent(hCtrl); for (const Skins::SKINLIST *sl = skins.getSkinList(); sl; sl = sl->next) { DWORD dwIndex = ListBox_AddString(hCtrl, sl->name); ListBox_SetItemData(hCtrl, dwIndex, sl->name); } ListBox_SetCurSel(hCtrl, ListBox_FindString(hCtrl, 0, PopupOptions.SkinPack)); // make shure we have select skin (ListBox_SetCurSel may be fail) TCHAR szNewSkin[128]; ListBox_GetText(hCtrl, ListBox_GetCurSel(hCtrl), &szNewSkin); if (mir_tstrcmp(pszOldSkin, szNewSkin) != 0) { mir_free(PopupOptions.SkinPack); PopupOptions.SkinPack = mir_tstrdup(szNewSkin); } const PopupSkin *skin = 0; if (skin = skins.getSkin(PopupOptions.SkinPack)) { // update Skin Option List from reload SkinPack bDlgInit = false; bDlgInit = SkinOptionList_Update(skinOptions, &skinOptionsCount, hwndDlg); } SendMessage(GetParent(hwndDlg), PSM_CHANGED, 0, 0); break; } updatePreviewImage(GetDlgItem(hwndDlg, IDC_PREVIEWBOX)); break; case CBN_SELCHANGE: // combo box controls switch (idCtrl) { case IDC_SKINLIST: { // Skin list change mir_free(PopupOptions.SkinPack); PopupOptions.SkinPack = mir_tstrdup((TCHAR *)SendDlgItemMessage( hwndDlg, IDC_SKINLIST, LB_GETITEMDATA, (WPARAM)SendDlgItemMessage(hwndDlg, IDC_SKINLIST, LB_GETCURSEL, 0, 0), 0)); const PopupSkin *skin = 0; if (skin = skins.getSkin(PopupOptions.SkinPack)) { mir_free(PopupOptions.SkinPack); PopupOptions.SkinPack = mir_tstrdup(skin->getName()); // update Skin Option List bDlgInit = false; bDlgInit = SkinOptionList_Update(skinOptions, &skinOptionsCount, hwndDlg); } updatePreviewImage(GetDlgItem(hwndDlg, IDC_PREVIEWBOX)); } SendMessage(GetParent(hwndDlg), PSM_CHANGED, 0, 0); break; }// end switch(idCtrl) break; }// end switch (HIWORD(wParam)) break; }// end WM_COMMAND case WM_NOTIFY: if (!bDlgInit) return FALSE; switch (((LPNMHDR)lParam)->idFrom) { case 0: switch (((LPNMHDR)lParam)->code) { case PSN_RESET: LoadOption_Skins(); return TRUE; case PSN_APPLY: { // skin pack db_set_ts(NULL, MODULNAME, "SkinPack", PopupOptions.SkinPack); // skin options const PopupSkin *skin = 0; if (skin = skins.getSkin(PopupOptions.SkinPack)) skin->saveOpts(); skins.freeAllButActive(); // more Skin options db_set_b(NULL, MODULNAME, "DisplayTime", PopupOptions.DisplayTime); db_set_b(NULL, MODULNAME, "DropShadow", PopupOptions.DropShadow); db_set_b(NULL, MODULNAME, "EnableShadowRegion", PopupOptions.EnableFreeformShadows); db_set_b(NULL, MODULNAME, "EnableAeroGlass", PopupOptions.EnableAeroGlass); db_set_b(NULL, MODULNAME, "UseMText", PopupOptions.UseMText); }// end PSN_APPLY: return TRUE; }// switch (((LPNMHDR)lParam)->code) break; }// end switch (((LPNMHDR)lParam)->idFrom) return FALSE; case WM_DESTROY: if (wndPreview) { delete wndPreview; wndPreview = NULL; gPreviewOk = false; } if (hhkFontsReload) UnhookEvent(hhkFontsReload); if (skinOptions) { for (int i = 0; i < skinOptionsCount; ++i) { mir_free(skinOptions[i].pszOptionName); mir_free(skinOptions[i].pszSettingName); } mir_free(skinOptions); skinOptions = NULL; skinOptionsCount = 0; } return TRUE; }// end switch (msg) return FALSE; } static void BoxPreview_OnPaint(HWND hwnd, HDC mydc, int mode) { RECT rc; switch (mode) { case 0: { // Avatar HDC hdcAvatar = CreateCompatibleDC(mydc); HBITMAP hbmSave = (HBITMAP)SelectObject(hdcAvatar, hbmNoAvatar); GetClientRect(hwnd, &rc); BITMAP bmp; GetObject(hbmNoAvatar, sizeof(bmp), &bmp); StretchBlt(mydc, 0, 0, rc.right, rc.bottom, hdcAvatar, 0, 0, abs(bmp.bmWidth), abs(bmp.bmHeight), SRCCOPY); SelectObject(hdcAvatar, hbmSave); DeleteDC(hdcAvatar); HRGN rgn = CreateRoundRectRgn(0, 0, rc.right, rc.bottom, 2 * PopupOptions.avatarRadius, 2 * PopupOptions.avatarRadius); FrameRgn(mydc, rgn, (HBRUSH)GetStockObject(BLACK_BRUSH), 1, 1); DeleteObject(rgn); } break; case 1: { // Opacity HBRUSH hbr = CreateSolidBrush(fonts.clBack); HFONT hfnt = (HFONT)SelectObject(mydc, fonts.title); GetClientRect(hwnd, &rc); FillRect(mydc, &rc, hbr); DrawIconEx(mydc, 10, (rc.bottom - rc.top - 16) / 2, IcoLib_GetIcon(ICO_POPUP_ON, 0), 16, 16, 0, hbr, DI_NORMAL); SetBkMode(mydc, TRANSPARENT); GetClientRect(hwnd, &rc); rc.left += 30; // 10+16+4 -- icon rc.right -= (rc.right - rc.left) / 3; rc.bottom -= (rc.bottom - rc.top) / 3; DrawText(mydc, _T(MODULNAME_LONG), -1, &rc, DT_CENTER | DT_NOPREFIX | DT_SINGLELINE | DT_VCENTER); GetClientRect(hwnd, &rc); rc.left += 30; // 10+16+4 -- icon rc.left += (rc.right - rc.left) / 3; rc.top += (rc.bottom - rc.top) / 3; DrawText(mydc, _T(MODULNAME_LONG), -1, &rc, DT_CENTER | DT_NOPREFIX | DT_SINGLELINE | DT_VCENTER); GetClientRect(hwnd, &rc); FrameRect(mydc, &rc, (HBRUSH)GetStockObject(BLACK_BRUSH)); SelectObject(mydc, hfnt); DeleteObject(hbr); } break; case 2: { // Position HBRUSH hbr = CreateSolidBrush(GetSysColor(COLOR_WINDOW)); GetClientRect(hwnd, &rc); FillRect(mydc, &rc, hbr); DeleteObject(hbr); hbr = CreateSolidBrush(GetSysColor(COLOR_HIGHLIGHT)); GetClientRect(hwnd, &rc); rc.right -= 100; rc.top += 100; FillRect(mydc, &rc, hbr); DeleteObject(hbr); HPEN hpen = (HPEN)SelectObject(mydc, CreatePen(PS_DOT, 1, RGB(0, 0, 0))); MoveToEx(mydc, 0, 100, NULL); LineTo(mydc, 201, 100); MoveToEx(mydc, 100, 0, NULL); LineTo(mydc, 100, 201); DeleteObject(SelectObject(mydc, hpen)); HRGN hrgn = CreateRectRgn(0, 0, 0, 0); GetWindowRgn(hwnd, hrgn); FrameRgn(mydc, hrgn, (HBRUSH)GetStockObject(BLACK_BRUSH), 1, 1); DeleteObject(hrgn); } break; } } INT_PTR CALLBACK BoxPreviewWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { switch (msg) { case WM_PAINT: if (GetUpdateRect(hwnd, 0, FALSE)) { PAINTSTRUCT ps; HDC mydc = BeginPaint(hwnd, &ps); BoxPreview_OnPaint(hwnd, mydc, GetWindowLongPtr(hwnd, GWLP_USERDATA)); EndPaint(hwnd, &ps); return TRUE; } break; case WM_PRINT: case WM_PRINTCLIENT: BoxPreview_OnPaint(hwnd, (HDC)wParam, GetWindowLongPtr(hwnd, GWLP_USERDATA)); return TRUE; case WM_LBUTTONDOWN: ReleaseCapture(); SendMessage(hwnd, WM_SYSCOMMAND, 0xF012 /*SC_DRAGMOVE*/, 0); return TRUE; } return DefWindowProc(hwnd, msg, wParam, lParam); }