// Extends the aero glass frame into the client area of the given window.
internal static bool ExtendGlassFrame(Window window, Thickness margins) {
if (!CanExtendGlassFrame) return false;
IntPtr hwnd = (new WindowInteropHelper(window)).Handle;
Assumption.IsTrue(hwnd != IntPtr.Zero, "The window must be shown before extending glass.");
window.Background = Brushes.Transparent;
HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent;
MARGINS m = new MARGINS(margins);
DwmExtendFrameIntoClientArea(hwnd, ref m);
return true;
}
internal static extern void DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset);