WPF实现毛玻璃效果

 [StructLayout(LayoutKind.Sequential)]
        public struct MARGINS
        {
            public int cxLeftWidth;
            public int cxRightWidth;
            public int cyTopHeight;
            public int cyBottomHeight;
        };

        [DllImport("DwmApi.dll")]
        public static extern int DwmExtendFrameIntoClientArea(
            IntPtr hwnd,
            ref MARGINS pMarInset);

        private void ExtendAeroGlass(Window window)
        {
            try
            {
                // 为WPF程序获取窗口句柄
                IntPtr mainWindowPtr = new WindowInteropHelper(window).Handle;
                HwndSource mainWindowSrc = HwndSource.FromHwnd(mainWindowPtr);
                mainWindowSrc.CompositionTarget.BackgroundColor = Colors.Transparent;

                // 设置Margins
                MARGINS margins = new MARGINS();

                // 扩展Aero Glass
                margins.cxLeftWidth = -1;
                margins.cxRightWidth = -1;
                margins.cyTopHeight = -1;
                margins.cyBottomHeight = -1;

                int hr = DwmExtendFrameIntoClientArea(mainWindowSrc.Handle, ref margins);
                if (hr < 0)
                {
                    MessageBox.Show("DwmExtendFrameIntoClientArea Failed");
                }
            }
            catch (DllNotFoundException)
            {
                Application.Current.MainWindow.Background = Brushes.White;
            }
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            this.Background = Brushes.Transparent;
            ExtendAeroGlass(this);
        }

[StructLayout(LayoutKind.Sequential)]
public struct MARGINS
{
    public MARGINS(Thickness t)
    {
        Left = (int)t.Left;
        Right = (int)t.Right;
        Top = (int)t.Top;
        Bottom = (int)t.Bottom;
    }
    public int Left;
    public int Right;
    public int Top;
    public int Bottom;
}

public class GlassHelper
{
    [DllImport("dwmapi.dll", PreserveSig = false)]
    static extern void DwmExtendFrameIntoClientArea(
        IntPtr hWnd, ref MARGINS pMarInset);
    [DllImport("dwmapi.dll", PreserveSig = false)]
        static extern bool DwmIsCompositionEnabled();

    public static bool ExtendGlassFrame(Window window, Thickness margin)
    {
        if (!DwmIsCompositionEnabled())
            return false;

        IntPtr hwnd = new WindowInteropHelper(window).Handle;
        if (hwnd == IntPtr.Zero)
            throw new InvalidOperationException(
            "The Window must be shown before extending glass.");

        // Set the background to transparent from both the WPF and Win32 perspectives
        window.Background = Brushes.Transparent;
        HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent;

        MARGINS margins = new MARGINS(margin);
        DwmExtendFrameIntoClientArea(hwnd, ref margins);
        return true;
    }
}

        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);
            GlassHelper.ExtendGlassFrame(this, new Thickness(-1));
        }

 xmlns:shell="clr-namespace:Microsoft.Windows.Shell;assembly=Microsoft.Windows.Shell"

<shell:WindowChrome.WindowChrome>
        <shell:WindowChrome GlassFrameThickness="-1" ResizeBorderThickness="1" 
                            CaptionHeight="15" CornerRadius="0" />
    </shell:WindowChrome.WindowChrome>

    <Window.Template>
        <ControlTemplate TargetType="{x:Type Window}">
            <Border BorderThickness="1">
                <DockPanel>
                    <Grid x:Name="WindowHeader" DockPanel.Dock="Top" Height="15">
                        <TextBlock Text="{TemplateBinding Title}"/>
                    </Grid>
                    <ContentPresenter Margin="5,5,5,5"/>
                </DockPanel>
            </Border>
        </ControlTemplate>
    </Window.Template>