private static bool SetGlassMargin(this Window window, Thickness margin)
{
if (!NativeMethods.DwmIsCompositionEnabled())
return false;
IntPtr handle = new WindowInteropHelper(window).Handle;
if (handle == IntPtr.Zero)
throw new InvalidOperationException("The Window must be loaded before extending glass.");
window.Background = (Brush)Brushes.Transparent;
HwndSource.FromHwnd(handle).CompositionTarget.BackgroundColor = Colors.Transparent;
MARGINS margins = new MARGINS(margin);
NativeMethods.DwmExtendFrameIntoClientArea(handle, ref margins);
return true;
}
public static extern void DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins);