[C#/WPF] 반투명 윈도우 사용하기

TestProject.zip

다운로드

▶ MainWindow.xaml

<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    WindowStartupLocation="CenterScreen"
    Width="800"
    Height="600"
    WindowStyle="None"
    AllowsTransparency="True"
    BorderThickness="1"
    BorderBrush="Black"
    Background="#12000000"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*"    />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <TextBlock Grid.Row="0"
            HorizontalAlignment="Left"
            VerticalAlignment="Center"
            Margin="5"
            Foreground="RoyalBlue">
            반투명 윈도우 사용하기
        </TextBlock>
        <Button Name="closeButton" Grid.Row="2"
            HorizontalAlignment="Right"
            VerticalAlignment="Center"
            Margin="5"
            Width="100"
            Height="30"
            Content="종료" />
    </Grid>
</Window>

 

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▶ MainWindow.xaml.cs

using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow : Window
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 윈도우 합성 어트리뷰트 설정하기 - SetWindowCompositionAttribute(windowHandle, data)

        /// <summary>
        /// 윈도우 합성 어트리뷰트 설정하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="data">데이터</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32.dll")]
        private static extern int SetWindowCompositionAttribute(IntPtr windowHandle, ref WindowCompositionAttributeData data);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();

            Loaded                 += Window_Loaded;
            this.closeButton.Click += closeButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 윈도우 로드시 처리하기 - Window_Loaded(sender, e)

        /// <summary>
        /// 윈도우 로드시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            ApplyGlassEffect(this);
        }

        #endregion
        #region 종료 버튼 클릭시 처리하기 - closeButton_Click(sender, e)

        /// <summary>
        /// 종료 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void closeButton_Click(object sender, RoutedEventArgs e)
        {
            Close();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 글래스 효과 적용하기 - ApplyGlassEffect(window)

        /// <summary>
        /// 글래스 효과 적용하기
        /// </summary>
        /// <param name="window">윈도우</param>
        private void ApplyGlassEffect(Window window)
        {
            WindowInteropHelper helper = new WindowInteropHelper(window);
            
            AccentPolicy accentPolicy = new AccentPolicy();

            accentPolicy.AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND;

            int accentPolicySize = Marshal.SizeOf(accentPolicy);

            IntPtr memoryHandle = Marshal.AllocHGlobal(accentPolicySize);

            Marshal.StructureToPtr(accentPolicy, memoryHandle, false);

            WindowCompositionAttributeData data = new WindowCompositionAttributeData();

            data.Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY;
            data.Data      = memoryHandle;
            data.DataSize  = accentPolicySize;

            SetWindowCompositionAttribute(helper.Handle, ref data);

            Marshal.FreeHGlobal(memoryHandle);
        }

        #endregion
    }
}