63 lines
2 KiB
C++
63 lines
2 KiB
C++
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// OLESTUFF.CPP
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// Implementation of OLE delay-loaded stuff. This is needed for the
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// classes defined in TBDROP.CPP and TABDROP.CPP.
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// More OLE stuff could go here in the future.
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// ==
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// Technically this code is not C++ however, both files that call us
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// are C++, and this is where we call for the C++ glue in crtfree.h.
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// So for now this remains a .CPP file.
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//
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// History:
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// 8/22/96 - t-mkim: created
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//
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#include "ctlspriv.h"
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#include "olestuff.h"
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// Allow C++ files to be linked in w/o error
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#define CPP_FUNCTIONS
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#include <crtfree.h>
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#define OLELIBNAME TEXT ("OLE32.DLL")
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// function pointers for GetProcAddress.
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typedef HRESULT (STDAPICALLTYPE *LPFNCOINITIALIZE)(LPMALLOC pMalloc);
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typedef void (STDAPICALLTYPE *LPFNCOUNINITIALIZE)(void);
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typedef HRESULT (STDAPICALLTYPE *LPFNREGISTERDRAGDROP)(HWND hwnd, LPDROPTARGET pDropTarget);
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typedef HRESULT (STDAPICALLTYPE *LPFNREVOKEDRAGDROP)(HWND hwnd);
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HMODULE PrivLoadOleLibrary ()
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{
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// We call GetModuleHandle first so we don't map the library if we don't
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// need to. We would like to avoid the overhead necessary to do so.
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return GetModuleHandle(OLELIBNAME) ? LoadLibrary (OLELIBNAME) : NULL;
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}
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BOOL PrivFreeOleLibrary(HMODULE hmodOle)
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{
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return FreeLibrary(hmodOle);
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}
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HRESULT PrivCoInitialize (HMODULE hmodOle)
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{
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LPFNCOINITIALIZE pfnCoInitialize = (LPFNCOINITIALIZE) GetProcAddress (hmodOle, "CoInitialize");
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return pfnCoInitialize (NULL);
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}
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void PrivCoUninitialize (HMODULE hmodOle)
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{
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LPFNCOUNINITIALIZE pfnCoUninitialize = (LPFNCOUNINITIALIZE) GetProcAddress (hmodOle, "CoUninitialize");
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pfnCoUninitialize ();
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}
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HRESULT PrivRegisterDragDrop (HMODULE hmodOle, HWND hwnd, IDropTarget *pDropTarget)
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{
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LPFNREGISTERDRAGDROP pfnRegisterDragDrop = (LPFNREGISTERDRAGDROP) GetProcAddress (hmodOle, "RegisterDragDrop");
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return pfnRegisterDragDrop(hwnd, pDropTarget);
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}
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HRESULT PrivRevokeDragDrop (HMODULE hmodOle, HWND hwnd)
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{
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LPFNREVOKEDRAGDROP pfnRevokeDragDrop = (LPFNREVOKEDRAGDROP) GetProcAddress (hmodOle, "RevokeDragDrop");
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return pfnRevokeDragDrop (hwnd);
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}
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