使用GDI+ 从资源文件中导入png图片，程序中加载并显示这个图片

HBITMAP  CPngFileLoadDlg::LoadImageFromRes( UINT  pResourceID,  HMODULE  hInstance,  LPCTSTR  pResourceType) {      HBITMAP  hBitmap = NULL;      LPCTSTR  pResourceName = MAKEINTRESOURCE(pResourceID);        HRSRC  hResource = FindResource(hInstance, pResourceName, pResourceType);        if (!hResource)      {                  return  NULL;      }        DWORD  dwResourceSize = SizeofResource(hInstance, hResource);        if (!dwResourceSize)      {                 return  NULL;      }        const  void * pResourceData = LockResource(LoadResource(hInstance, hResource));        if (!pResourceData)      {                  return  NULL;      }        HGLOBAL  hResourceBuffer = GlobalAlloc(GMEM_MOVEABLE, dwResourceSize);        if (!hResourceBuffer)      {          GlobalFree(hResourceBuffer);                   return  NULL;      }        void * pResourceBuffer = GlobalLock(hResourceBuffer);        if (!pResourceBuffer)      {          GlobalUnlock(hResourceBuffer);          GlobalFree(hResourceBuffer);                 return  NULL;      }        CopyMemory(pResourceBuffer, pResourceData, dwResourceSize);      IStream* pIStream = NULL;        if (CreateStreamOnHGlobal(hResourceBuffer, FALSE, &pIStream)==S_OK)      {                 <strong> //  返回空指针</strong>          Gdiplus::Image *pImage = Gdiplus::Image::FromStream(pIStream);          Gdiplus::Bitmap *pBitmap = Gdiplus::Bitmap::FromStream(pIStream);            pIStream->Release();          GlobalUnlock(hResourceBuffer);          GlobalFree(hResourceBuffer);            if (pBitmap==NULL)          {                          return  NULL;          }            Gdiplus::Status result = pBitmap->GetLastStatus();            if (result==Gdiplus::Ok)          {              pBitmap->GetHBITMAP(NULL, &hBitmap);              return  hBitmap;          }            delete  pBitmap;          //throw getGdiplusErrorString(result);      }      GlobalUnlock(hResourceBuffer);      GlobalFree(hResourceBuffer);           return  NULL; }

用以下形式调用：

C/C++ code

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// 加载PNG HINSTANCE  hResInstance = ::AfxGetInstanceHandle();      m_hImage = LoadImageFromRes(IDB_PNG1, hResInstance,  "PNG" ); // 加载bmp HINSTANCE  hResInstance = ::AfxGetInstanceHandle();      m_hImage = LoadImageFromRes(IDB_BITMAP1, hResInstance, RT_BITMAP);