用法

1. Win7 DwmSetWindowAttribute function
2. Win10 SetWindowCompositionAttribute

1.   1 using System;
     2 using System.Collections.Generic;
     3 using System.Linq;
     4 using System.Runtime.InteropServices;
     5 using System.Text;
     6 using System.Threading.Tasks;
     7 using System.Windows;
     8 using System.Windows.Interop;
     9
    10 namespace AeroWindow
    11 {
    12     internal static class NativeMethods
    13     {
    14         [DllImport("user32.dll")]
    15         internal static extern int SetWindowCompositionAttribute(IntPtr hwnd, ref WindowCompositionAttribData data);
    16
    17         [StructLayout(LayoutKind.Sequential)]
    18         internal struct WindowCompositionAttribData
    19         {
    20             public WindowCompositionAttribute Attribute;
    21             public IntPtr Data;
    22             public int SizeOfData;
    23         }
    24
    25         [StructLayout(LayoutKind.Sequential)]
    26         internal struct AccentPolicy
    27         {
    28             public AccentState AccentState;
    29             public AccentFlags AccentFlags;
    30             public int GradientColor;
    31             public int AnimationId;
    32         }
    33
    34         [Flags]
    35         internal enum AccentFlags
    36         {
    37             // ...
    38             DrawLeftBorder = 0x20,
    39             DrawTopBorder = 0x40,
    40             DrawRightBorder = 0x80,
    41             DrawBottomBorder = 0x100,
    42             DrawAllBorders = (DrawLeftBorder | DrawTopBorder | DrawRightBorder | DrawBottomBorder)
    43             // ...
    44         }
    45
    46         internal enum WindowCompositionAttribute
    47         {
    48             // ...
    49             WCA_ACCENT_POLICY = 19
    50             // ...
    51         }
    52
    53         internal enum AccentState
    54         {
    55             ACCENT_DISABLED = 0,
    56             ACCENT_ENABLE_GRADIENT = 1,
    57             ACCENT_ENABLE_TRANSPARENTGRADIENT = 2,
    58             ACCENT_ENABLE_BLURBEHIND = 3,
    59             ACCENT_INVALID_STATE = 4
    60         }
    61
    62         public static void EnableBlur(this Window window)
    63         {
    64             if (SystemParameters.HighContrast)
    65             {
    66                 return; // Blur is not useful in high contrast mode
    67             }
    68             SetAccentPolicy(window, NativeMethods.AccentState.ACCENT_ENABLE_BLURBEHIND);
    69         }
    70
    71
    72         public static void DisableBlur(this Window window)
    73         {
    74             SetAccentPolicy(window, NativeMethods.AccentState.ACCENT_DISABLED);
    75         }
    76
    77         private static void SetAccentPolicy(Window window, NativeMethods.AccentState accentState)
    78         {
    79             var windowHelper = new WindowInteropHelper(window);
    80             var accent = new NativeMethods.AccentPolicy
    81             {
    82                 AccentState = accentState,
    83                 AccentFlags = GetAccentFlagsForTaskbarPosition(),
    84                   AnimationId = 2
    85             };
    86             var accentStructSize = Marshal.SizeOf(accent);
    87             var accentPtr = Marshal.AllocHGlobal(accentStructSize);
    88             Marshal.StructureToPtr(accent, accentPtr, false);
    89             var data = new NativeMethods.WindowCompositionAttribData
    90             {
    91                 Attribute = NativeMethods.WindowCompositionAttribute.WCA_ACCENT_POLICY,
    92                 SizeOfData = accentStructSize,
    93                 Data = accentPtr
    94             };
    95             NativeMethods.SetWindowCompositionAttribute(windowHelper.Handle, ref data);
    96             Marshal.FreeHGlobal(accentPtr);
    97         }
    98
    99         private static NativeMethods.AccentFlags GetAccentFlagsForTaskbarPosition()
   100         {
   101             return NativeMethods.AccentFlags.DrawAllBorders;
   102         }
   103     }
   104  }
   

    1  public MainWindow()
    2         {
    3             RoutedEventHandler handler = null;
    4             handler = (s, e) =>
    5             {
    6                 Loaded -= handler;
    7                 this.EnableBlur();
    8             };
    9             Loaded += handler;
   10
   11             InitializeComponent();
   12         }

    1 <Window x:Class="AeroWindow.MainWindow"
    2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    4         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    5         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    6         xmlns:shell="http://schemas.microsoft.com/winfx/2006/xaml/presentation/shell"
    7         xmlns:local="clr-namespace:AeroWindow"
    8         mc:Ignorable="d"
    9         Background="#44E6ECF0"
   10         Title="MainWindow" Height="600" Width="800" >
   11     <shell:WindowChrome.WindowChrome>
   12         <shell:WindowChrome GlassFrameThickness="1" UseAeroCaptionButtons="False"  NonClientFrameEdges="None"  CornerRadius="10" CaptionHeight="600"   />
   13     </shell:WindowChrome.WindowChrome>
   14     <Grid/>
   15 </Window>