internal static extern int DwmEnableBlurBehindWindow(
IntPtr hwnd,
ref NativeMethods.DWM_BLURBEHIND bb);
void OnGlass()
{
PresentationSource p = PresentationSource.FromVisual(this);
HwndSource s_hwndSource = p as HwndSource;
if (s_hwndSource != null)
{
s_hwndSource.CompositionTarget.BackgroundColor = Color.FromArgb(0, 0, 0, 0);
handle = s_hwndSource.Handle;
}
NativeMethods.RECT r = new NativeMethods.RECT();
UnsafeNativeMethods.GetClientRect(handle, ref r);
IntPtr hrgn = UnsafeNativeMethods.CreateRectRgn(0, 0, 1, 1);
NativeMethods.DWM_BLURBEHIND bb = new NativeMethods.DWM_BLURBEHIND();
bb.dwFlags = NativeMethods.DWM_BB_ENABLE | NativeMethods.DWM_BB_BLURREGION;
bb.fEnable = true;
bb.hRgnBlur = hrgn;
UnsafeNativeMethods.DwmEnableBlurBehindWindow(handle, ref bb);
NativeMethods.MARGINS mar = new NativeMethods.MARGINS();
mar.cyTopHeight = 37;
UnsafeNativeMethods.DwmExtendFrameIntoClientArea(handle, ref mar);
//Need to make the Window size dirty.
this.WindowState = WindowState.Minimized;
this.WindowState = WindowState.Normal;
}