в закромах своего винта нашел такой код - когда-то он точно работал 
| Код |
//-----------------------------------------------------------------------------------
int GetEncoderClsid(WCHAR *format, CLSID *pClsid)
{
unsigned int num = 0, size = 0;
GetImageEncodersSize(&num, &size);
if(size == 0) return -1;
ImageCodecInfo *pImageCodecInfo = (ImageCodecInfo *)(malloc(size));
if(pImageCodecInfo == NULL) return -1;
GetImageEncoders(num, size, pImageCodecInfo);
for(unsigned int j = 0; j < num; ++j){
if(wcscmp(pImageCodecInfo[j].MimeType, format) == 0){
*pClsid = pImageCodecInfo[j].Clsid;
free(pImageCodecInfo);
return j;
}
}
free(pImageCodecInfo);
return -1;
}
//-----------------------------------------------------------------------------------
int TakeJpgScreenShot(LPWSTR lpszFilename, ULONG uQuality) // by Napalm
{
ULONG_PTR gdiplusToken;
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
HDC hdcScreen = CreateDC("DISPLAY", NULL, NULL, NULL);
HDC hdcCapture = CreateCompatibleDC(hdcScreen);
int nWidth = GetDeviceCaps(hdcScreen, HORZRES),
nHeight = GetDeviceCaps(hdcScreen, VERTRES),
nBPP = GetDeviceCaps(hdcScreen, BITSPIXEL);
LPBYTE lpCapture;
BITMAPINFO bmiCapture = { {
sizeof(BITMAPINFOHEADER), nWidth, -nHeight, 1, nBPP, BI_RGB, 0, 0, 0, 0, 0,
} };
HBITMAP hbmCapture = CreateDIBSection(hdcScreen, &bmiCapture,
DIB_PAL_COLORS, (LPVOID *)&lpCapture, NULL, 0);
if(!hbmCapture){
DeleteDC(hdcCapture);
DeleteDC(hdcScreen);
GdiplusShutdown(gdiplusToken);
return 1;
}
int nCapture = SaveDC(hdcCapture);
SelectObject(hdcCapture, hbmCapture);
BitBlt(hdcCapture, 0, 0, nWidth, nHeight, hdcScreen, 0, 0, SRCCOPY);
RestoreDC(hdcCapture, nCapture);
DeleteDC(hdcCapture);
DeleteDC(hdcScreen);
CLSID imageCLSID;
Bitmap *pScreenShot = new Bitmap(hbmCapture, (HPALETTE)NULL);
EncoderParameters encoderParams;
encoderParams.Count = 1;
encoderParams.Parameter[0].NumberOfValues = 1;
encoderParams.Parameter[0].Guid = EncoderQuality;
encoderParams.Parameter[0].Type = EncoderParameterValueTypeLong;
encoderParams.Parameter[0].Value = &uQuality;
GetEncoderClsid(L"image/jpeg", &imageCLSID);
int result = (pScreenShot->Save(lpszFilename, &imageCLSID, &encoderParams) == Ok);
delete pScreenShot;
DeleteObject(hbmCapture);
GdiplusShutdown(gdiplusToken);
return result;
}
//-----------------------------------------------------------------------------------
|
попробуй по аналогии свой код подогнать |