public static Bitmap CaptureDWM()
{
if (thumb != IntPtr.Zero)
{
DwmUnregisterThumbnail(thumb);
}
int windowWidth;
if (DebugForm.WindowRect.X > DebugForm.WindowRect.Width)
{
windowWidth = DebugForm.WindowRect.X - DebugForm.WindowRect.Width;
}
else
{
windowWidth = DebugForm.WindowRect.Width - DebugForm.WindowRect.X;
}
var windowHeight = DebugForm.WindowRect.Height - DebugForm.WindowRect.Y;
var dwmCaptureForm = new Form
{
Text = "DWM Capture Window",
Width = windowWidth + 15,
Height = windowHeight + 32,
Left = 0,
Top = 0,
TopMost = true
};
dwmCaptureForm.Show();
int i = DwmRegisterThumbnail(dwmCaptureForm.Handle, DebugForm.WindowHandle, out thumb);
if (i == 0)
{
DWMFunctions.UpdateThumb();
}
DebugForm.GetWindowRect(dwmCaptureForm.Handle, out var dwmCapRectangle);
var dwmCapture = new CaptureImage().CaptureFromScreen(dwmCapRectangle);
DebugForm.DebugPictureBox.Invoke(
new MethodInvoker(delegate { DebugForm.DebugPictureBox.Image = dwmCapture; }));
DwmUnregisterThumbnail(thumb);
dwmCaptureForm.Close();
return(dwmCapture);
}