[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>