WinAPI C++ Простое преобразование JPG в BMP

/*Файл jpgbmp-ole.сpp*/
#include <windows.h>
#include <olectl.h>
LPDISPATCH pImage;
HBITMAP LoadSaveImg(LPCTSTR pszFileName,char outName[MAX_PATH])
{
 HANDLE hFile=CreateFile(pszFileName,GENERIC_READ,0,NULL,
   OPEN_EXISTING,0,NULL);
 DWORD dwFileSize=GetFileSize(hFile,NULL);
 HGLOBAL hGlobalA=GlobalAlloc(GMEM_MOVEABLE,dwFileSize);
 LPVOID pvData=GlobalLock(hGlobalA);
 DWORD dwBytesRead=0;
 BOOL bReadFile=ReadFile(hFile,pvData,dwFileSize,&dwBytesRead,NULL);
 GlobalUnlock( hGlobalA );
 CloseHandle(hFile);
 LPSTREAM pst=NULL;
 HRESULT hr=CreateStreamOnHGlobal(hGlobalA,TRUE,&pst);
 if(pImage) pImage->Release();
 hr=OleLoadPicture(pst,dwFileSize,FALSE,IID_IPicture,(LPVOID*)&pImage);
 pst->Release();
 WCHAR fBuff[MAX_PATH];
 mbstowcs(fBuff,outName,sizeof(fBuff)/sizeof(WCHAR));
 OleSavePictureFile(pImage,fBuff);
}

int main()
{
 char fNamIn[]="CLOCK.jpg",fNamOut[]="CLOCK.bmp";        
 LoadSaveImg(fNamIn,fNamOut);
 return 0;
}