private void Cleanup(int hBitmap, int hdcSrc, int hdcDest)
{
User32.ReleaseDC(User32.GetDesktopWindow(), hdcSrc);
GDI32.DeleteDC(hdcDest);
GDI32.DeleteObject(hBitmap);
}
/// <summary>
/// Creates an Image object containing a screen shot of the entire desktop
/// </summary>
/// <returns></returns>
public void CaptureScreen(string fileName, ImageFormat imageFormat)
{
int hdcSrc = User32.GetWindowDC(User32.GetDesktopWindow()),
hdcDest = GDI32.CreateCompatibleDC(hdcSrc),
hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc,
GDI32.GetDeviceCaps(hdcSrc, 8), GDI32.GetDeviceCaps(hdcSrc, 10)); GDI32.SelectObject(hdcDest, hBitmap);
GDI32.BitBlt(hdcDest, 0, 0, GDI32.GetDeviceCaps(hdcSrc, 8),
GDI32.GetDeviceCaps(hdcSrc, 10), hdcSrc, 0, 0, 0x00CC0020);
SaveImageAs(hBitmap, fileName, imageFormat);
Cleanup(hBitmap, hdcSrc, hdcDest);
}