public static Bitmap CaptureWindow(IntPtr wndHandle, Point point, int width, int height)
{
User32.Rect windowRect;
User32.GetWindowRect(wndHandle, out windowRect);
var windowWidth = windowRect.right - windowRect.left;
var windowHeight = windowRect.bottom - windowRect.top;
var bmp = new Bitmap(windowWidth, windowHeight, PixelFormat.Format32bppArgb);
using (var graphics = Graphics.FromImage(bmp))
{
var hdc = graphics.GetHdc();
try
{
User32.PrintWindow(wndHandle, hdc, 0);
}
finally
{
graphics.ReleaseHdc(hdc);
}
}
var cRect = new User32.Rect();
User32.GetClientRect(wndHandle, ref cRect);
var cWidth = cRect.right - cRect.left;
var cHeight = cRect.bottom - cRect.top;
var captionHeight = windowHeight - cHeight > 0 ? SystemInformation.CaptionHeight : 0;
return(bmp.Clone(new Rectangle((windowWidth - cWidth) / 2 + point.X,
(windowHeight - cHeight - captionHeight) / 2 + captionHeight + point.Y,
width, height), PixelFormat.Format32bppArgb));
}
