Day: December 13, 2018

HBITMAP loadPictureFromFile(LPCTSTR szFile)
{
	HANDLE hFile = CreateFile(szFile, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
	if (INVALID_HANDLE_VALUE == hFile)
		return NULL;
 
	DWORD dwFileSize = GetFileSize(hFile, NULL);
 
	LPVOID pvData = NULL;
	HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, dwFileSize);
 
	pvData = GlobalLock(hGlobal);
 
	DWORD dwBytesRead = 0;
	BOOL bRead = ReadFile(hFile, pvData, dwFileSize, &dwBytesRead, NULL);
	GlobalUnlock(hGlobal);
	CloseHandle(hFile);
 
	LPSTREAM pStm = NULL;
	HRESULT hr = CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);
 
	LPPICTURE gpPicture;
 
	hr = ::OleLoadPicture(pStm, dwFileSize, FALSE, IID_IPicture, (LPVOID *)&gpPicture);
 
	pStm->Release();
 
	OLE_HANDLE picHandle;
	gpPicture->get_Handle(&picHandle);
	HDC hdc = ::CreateCompatibleDC(NULL);
	::SelectObject(hdc, (HGDIOBJ)picHandle);
 
	HBITMAP hRet = (HBITMAP)::GetCurrentObject(hdc, OBJ_BITMAP);
	DeleteDC(hdc);
 
//	gpPicture->Release(); // 这里不能释放gpPicture，否则返回的hRet是野指针数据
 
	return hRet;
}