Как сохранить веб страничку в JPEG

procedure generateJPEGfromBrowser(browser: iWebBrowser2; jpegFQFilename: String;
  srcHeight: Integer; srcWidth: Integer; tarHeight: Integer; tarWidth: Integer);
var
  sourceDrawRect : TRect;
  targetDrawRect: TRect;
  sourceBitmap: TBitmap;
  targetBitmap: TBitmap;
  jpeg: TJPEGImage;
  viewObject: IViewObject;
begin
  sourceBitmap := TBitmap.Create ;
  targetBitmap := TBitmap.Create ;
  jpeg := TJPEGImage.Create ;
  try
    try
      sourceDrawRect := Rect(0,0, srcWidth , srcHeight );
      sourceBitmap.Width :=  srcWidth ;
      sourceBitmap.Height :=  srcHeight ;

      viewObject := browser as IViewObject;

      if viewObject = nil then
        Exit;

      OleCheck(viewObject.Draw(DVASPECT_CONTENT, 1, nil, nil, self.Handle,
        sourceBitmap.Canvas.Handle, @sourceDrawRect, nil, nil, 0));

      // Resize Bitmap
      targetDrawRect := Rect(0,0, tarWidth, tarHeight);
      targetBitmap.Height := tarHeight;
      targetBitmap.Width := tarWidth;
      targetBitmap.Canvas.StretchDraw(targetDrawRect, sourceBitmap);

      // Create JPEG from Bitmap and save it
      jpeg.Assign(targetBitmap) ;
      makeFileWriteable(jpegFQFilename);
      jpeg.SaveToFile (jpegFQFilename);
    finally
      jpeg.free;
      sourceBitmap.free ;
      targetBitmap.free;
    end;
  except
  // errors
  end;
end;