public static Bitmap CaptureWindow(IntPtr hWnd, CaptureMethod Method)
{
if (hWnd == IntPtr.Zero)
{
return(null);
}
int style = ExternalAPI.GetWindowLong(hWnd, -16);
//int Exstyle = ExternalAPI.GetWindowLong(hWnd, -20);
// Ignore Popup windows
if ((style & 0x80000000) != 0)
{
return(null);
}
var winrect = new ExternalAPI.Rect();
ExternalAPI.GetWindowRect(hWnd, ref winrect);
var clientrec = new ExternalAPI.Rect();
ExternalAPI.GetClientRect(hWnd, ref clientrec);
int width = clientrec.right - clientrec.left;
int height = clientrec.bottom - clientrec.top;
if (width <= 0 || height <= 0)
{
return(null);
}
var bmp = new Bitmap(width, height, PixelFormat.Format32bppArgb);
using (Graphics graphics = Graphics.FromImage(bmp))
{
if (Method == CaptureMethod.PaintWindow)
{
IntPtr Handle = graphics.GetHdc();
ExternalAPI.PrintWindow(hWnd, Handle, 1);
graphics.ReleaseHdc(Handle);
}
else if (Method == CaptureMethod.DesktopCapture)
{
var tempPoint = new Point();
tempPoint.x = clientrec.left;
tempPoint.y = clientrec.top;
ClientToScreen(hWnd, ref tempPoint);
graphics.CopyFromScreen(tempPoint.x, tempPoint.y, 0, 0, new Size(width, height), CopyPixelOperation.SourceCopy);
}
}
return(bmp);
}