private static extern void DwmEnableBlurBehindWindow(IntPtr hWnd, ref BLURBEHIND pBlurBehind);
/// <summary>
/// Toggle the Blurred glass on the specified window region of the client area of a Window.
/// </summary>
/// <param name="window">The window.</param>
/// <param name="enable">if set to <c>true</c> enable, otherwise disable.</param>
/// <param name="region">A pointer to the region to to enable blur on, or IntPtr.Zero for the whole window</param>
/// <param name="transition">If set to <c>true</c> transition the blur on Maximized.</param>
public static void EnableBlurBehind(this Window window, bool enable, IntPtr region, bool transition)
{
var blurBehind = new BLURBEHIND
{
Flags = (BlurBehindOptions.Enable | BlurBehindOptions.TransitionOnMaximized),
Enable = enable,
TransitionOnMaximized = transition
};
if (enable && IntPtr.Zero != region)
{
blurBehind.Flags |= BlurBehindOptions.BlurRegion;
blurBehind.RegionBlur = region;
}
DwmEnableBlurBehindWindow(new WindowInteropHelper(window).Handle, ref blurBehind);
}
