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{
This file is part of the Free Pascal run time library.
Copyright (c) 2006 by Florian Klaempfl
member of the Free Pascal development team.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
**********************************************************************}
{$mode objfpc}
{$H+}
{$inline on}
unit mcomobj;
interface
{ $define DEBUG_COM}
uses
Windows,Sysutils,classes;
const
CLSCTX_INPROC_SERVER = $0001; // server dll (runs in same process as caller)
CLSCTX_INPROC_HANDLER = $0002; // handler dll (runs in same process as caller)
CLSCTX_LOCAL_SERVER = $0004; // server exe (runs on same machine; diff proc)
CLSCTX_INPROC_SERVER16 = $0008; // 16-bit server dll (runs in same process as caller)
CLSCTX_REMOTE_SERVER = $0010; // remote server exe (runs on different machine)
CLSCTX_INPROC_HANDLER16 = $0020; // 16-bit handler dll (runs in same process as caller)
CLSCTX_INPROC_SERVERX86 = $0040; // Wx86 server dll (runs in same process as caller)
CLSCTX_INPROC_HANDLERX86 = $0080; // Wx86 handler dll (runs in same process as caller)
CLSCTX_ESERVER_HANDLER = $0100; // handler dll (runs in the server process)
CLSCTX_RESERVED =$0200; // reserved
CLSCTX_NO_CODE_DOWNLOAD = $0400; // disallow code download from the Directory Service (if any) or the internet -rahulth
CLSCTX_NO_WX86_TRANSLATION = $0800;
CLSCTX_NO_CUSTOM_MARSHAL = $1000;
CLSCTX_ENABLE_CODE_DOWNLOAD = $2000; // allow code download from the Directory Service (if any) or the internet
CLSCTX_NO_FAILURE_LOG = $04000; // do not log messages about activation failure (should one occur) to Event Log
CLSCTX_DISABLE_AAA = $08000; // Disable EOAC_DISABLE_AAA capability for this activation only
CLSCTX_ENABLE_AAA = $10000; // Enable EOAC_DISABLE_AAA capability for this activation only
CLSCTX_FROM_DEFAULT_CONTEXT = $20000; // Begin this activation from the default context of the current apartment
CLSCTX_INPROC = (CLSCTX_INPROC_SERVER OR CLSCTX_INPROC_HANDLER);
CLSCTX_ALL = (CLSCTX_INPROC_SERVER OR CLSCTX_INPROC_HANDLER OR CLSCTX_LOCAL_SERVER {$ifdef Remote} OR CLSCTX_REMOTE_SERVER {$endif});
CLSCTX_SERVER = (CLSCTX_INPROC_SERVER OR CLSCTX_LOCAL_SERVER {$ifdef Remote} OR CLSCTX_REMOTE_SERVER {$endif});
MEMCTX_TASK = 1; // task (private) memory
MEMCTX_SHARED = 2; // shared memory (between processes)
MEMCTX_MACSYSTEM = 3; // on the mac, the system heap
// these are mostly for internal use...
MEMCTX_UNKNOWN = -1; // unknown context (when asked about it)
MEMCTX_SAME = -2; // same context (as some other pointer)
type
TOleChar = WideChar;
POleStr = PWideChar;
PPOleStr = ^POleStr;
OleChar = WChar;
LPOLESTR = ^OLECHAR;
POLECHAR = LPOLESTR;
PLPOLESTR = ^LPOLESTR;
TClassInstancing = (ciInternal, ciSingleInstance, ciMultiInstance);
TThreadingModel = (tmSingle, tmApartment, tmFree, tmBoth, tmNeutral);
function CreateComObject(const ClassID: TGUID) : IUnknown;
function CreateOleObject(const ClassName : string) : IDispatch;
function GetActiveOleObject(const ClassName: string) : IDispatch;
procedure OleCheck(Value : HResult);inline;
procedure OleError(Code: HResult);
function ProgIDToClassID(const id : string) : TGUID;
function ClassIDToProgID(const classID: TGUID): string;
type
TCoInitializeExProc = function (pvReserved: Pointer;
coInit: DWORD): HResult; stdcall;
TCoAddRefServerProcessProc = function : ULONG; stdcall;
TCoReleaseServerProcessProc = function : ULONG; stdcall;
TCoResumeClassObjectsProc = function : HResult; stdcall;
TCoSuspendClassObjectsProc = function : HResult; stdcall;
_COSERVERINFO = Record
dwReserved1 : DWord;
pwszName : LPWSTR;
pAuthInfo : Pointer;
dwReserved2 : DWord;
end;
TCOSERVERINFO = _COSERVERINFO;
PCOSERVERINFO = ^TCOSERVERINFO;
IMalloc = Interface(IUnknown)
['{00000002-0000-0000-C000-000000000046}']
Function Alloc(cb :size_t):Pointer; Stdcall;
Function Realloc (pv :pointer;cb:size_t):Pointer;stdcall;
Procedure Free({[in]} pv: pointer); Stdcall;
Function GetSize(pv:pointer):size_t;stdcall;
Function DidAlloc(pv:pointer):Longint;stdcall;
procedure HeapMinimize; stdcall;
End;
const
CoInitializeEx : TCoInitializeExProc = nil;
CoAddRefServerProcess : TCoAddRefServerProcessProc = nil;
CoReleaseServerProcess : TCoReleaseServerProcessProc = nil;
CoResumeClassObjects : TCoResumeClassObjectsProc = nil;
CoSuspendClassObjects : TCoSuspendClassObjectsProc = nil;
CoInitFlags : Longint = -1;
function CLSIDFromProgID(_para1:POLESTR; _para2:LPCLSID):HRESULT;stdcall; external 'ole32.dll' name 'CLSIDFromProgID';
function CLSIDFromProgID(_para1:POLESTR; out _para2:TCLSID):HRESULT;stdcall; external 'ole32.dll' name 'CLSIDFromProgID';
function CoInitialize(_para1:PVOID):HRESULT;stdcall; external 'ole32.dll' name 'CoInitialize';
function CoCreateInstance(const _para1:TCLSID; _para2:IUnknown; _para3:DWORD;const _para4:TIID;out _para5):HRESULT;stdcall; external 'ole32.dll' name 'CoCreateInstance';
function GetActiveObject(const clsid: TCLSID; pvReserved: Pointer; out unk: IUnknown) : HResult; stdcall; external 'oleaut32.dll' name 'GetActiveObject';
function ProgIDFromCLSID(para:PCLSID; out _para2:POLESTR):HRESULT;stdcall; external 'ole32.dll' name 'ProgIDFromCLSID';
function ProgIDFromCLSID(const _para1:TCLSID; out _para2:POLESTR):HRESULT;stdcall; external 'ole32.dll' name 'ProgIDFromCLSID';
procedure CoTaskMemFree(_para1:PVOID);stdcall; external 'ole32.dll' name 'CoTaskMemFree';
function CoGetMalloc(_para1:DWORD; out _para2:IMalloc):HRESULT;stdcall; external 'ole32.dll' name 'CoGetMalloc';
procedure CoUninitialize;stdcall; external 'ole32.dll' name 'CoUninitialize';
implementation
uses
ComConst, Ole2, RtlConsts;
function CreateComObject(const ClassID : TGUID) : IUnknown;
begin
OleCheck(CoCreateInstance(ClassID,nil,CLSCTX_INPROC_SERVER or CLSCTX_LOCAL_SERVER,IUnknown,result));
end;
function CreateOleObject(const ClassName : string) : IDispatch;
var
id : TCLSID;
begin
id:=ProgIDToClassID(ClassName);
OleCheck(CoCreateInstance(id,nil,CLSCTX_INPROC_SERVER or CLSCTX_LOCAL_SERVER,IDispatch,result));
end;
function GetActiveOleObject(const ClassName : string) : IDispatch;
{$ifndef wince}
var
intf : IUnknown;
id : TCLSID;
begin
id:=ProgIDToClassID(ClassName);
OleCheck(GetActiveObject(id,nil,intf));
OleCheck(intf.QueryInterface(IDispatch,Result));
end;
{$else}
begin
Result:=nil;
end;
{$endif wince}
procedure OleError(Code: HResult);
begin
end;
procedure OleCheck(Value : HResult);inline;
begin
if not(Succeeded(Value)) then
OleError(Value);
end;
function ProgIDToClassID(const id : string) : TGUID;
begin
OleCheck(CLSIDFromProgID(PWideChar(WideString(id)),result));
end;
function ClassIDToProgID(const classID: TGUID): string;
var
progid : LPOLESTR;
begin
OleCheck(ProgIDFromCLSID(@classID,progid));
result:=progid;
CoTaskMemFree(progid);
end;
const
Initialized : boolean = false;
var
Ole32Dll : HModule;
initialization
Ole32Dll:=GetModuleHandle('ole32.dll');
if Ole32Dll<>0 then
begin
Pointer(CoInitializeEx):=GetProcAddress(Ole32Dll,'CoInitializeEx');
Pointer(CoAddRefServerProcess):=GetProcAddress(Ole32Dll,'CoAddRefServerProcess');
Pointer(CoReleaseServerProcess):=GetProcAddress(Ole32Dll,'CoReleaseServerProcess');
Pointer(CoResumeClassObjects):=GetProcAddress(Ole32Dll,'CoResumeClassObjects');
Pointer(CoSuspendClassObjects):=GetProcAddress(Ole32Dll,'CoSuspendClassObjects');
end;
if not(IsLibrary) then
{$ifndef wince}
if (CoInitFlags=-1) or not(assigned(mcomobj.CoInitializeEx)) then
Initialized:=Succeeded(CoInitialize(nil))
else
{$endif wince}
Initialized:=Succeeded(mcomobj.CoInitializeEx(nil, CoInitFlags));
finalization
if Initialized then
CoUninitialize;
end.
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