在.NET Framework 4.7中检测Windows Game Bar激活及输入重定向的问题

无需依赖第三方NuGet包，直接通过P/Invoke调用Windows原生API即可实现需求，以下是C#和VB.Net的实现代码：

C# 实现 #

检测工具类 #

using System;
using System.Runtime.InteropServices;

public static class GameBarDetector
{
    [DllImport("windows.gaming.ui.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
    private static extern bool IsGameBarPresent();

    [DllImport("windows.gaming.ui.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
    private static extern bool IsGameBarRunning();

    [DllImport("user32.dll", SetLastError = true)]
    private static extern bool GetWindowDisplayAffinity(IntPtr hWnd, out uint pdwAffinity);

    private const uint WDA_MONITOR = 0x00000001;

    public static bool IsGameBarEnabled()
    {
        try
        {
            return IsGameBarPresent() && IsGameBarRunning();
        }
        catch (DllNotFoundException)
        {
            return false;
        }
    }

    public static bool IsInputRedirected(IntPtr windowHandle)
    {
        if (!IsGameBarEnabled())
            return false;

        if (GetWindowDisplayAffinity(windowHandle, out uint affinity))
        {
            return (affinity & WDA_MONITOR) != 0;
        }
        return false;
    }
}

WinForms中调用示例 #

private void CheckGameBarState()
{
    bool isGameBarActive = GameBarDetector.IsGameBarEnabled();
    bool isInputRedirected = GameBarDetector.IsInputRedirected(this.Handle);

    MessageBox.Show($"Game Bar状态：{(isGameBarActive ? "已开启" : "未开启")}\n输入重定向：{(isInputRedirected ? "是" : "否")}");
}

VB.Net 实现 #

检测工具模块 #

Imports System
Imports System.Runtime.InteropServices

Public Module GameBarDetector
    <DllImport("windows.gaming.ui.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
    Private Function IsGameBarPresent() As Boolean
    End Function

    <DllImport("windows.gaming.ui.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
    Private Function IsGameBarRunning() As Boolean
    End Function

    <DllImport("user32.dll", SetLastError:=True)>
    Private Function GetWindowDisplayAffinity(hWnd As IntPtr, ByRef pdwAffinity As UInteger) As Boolean
    End Function

    Private Const WDA_MONITOR As UInteger = &H1

    Public Function IsGameBarEnabled() As Boolean
        Try
            Return IsGameBarPresent() AndAlso IsGameBarRunning()
        Catch ex As DllNotFoundException
            Return False
        End Try
    End Function

    Public Function IsInputRedirected(windowHandle As IntPtr) As Boolean
        If Not IsGameBarEnabled() Then
            Return False
        End If

        Dim affinity As UInteger
        If GetWindowDisplayAffinity(windowHandle, affinity) Then
            Return (affinity And WDA_MONITOR) <> 0
        End If
        Return False
    End Function
End Module

WinForms中调用示例 #

Private Sub CheckGameBarState()
    Dim isGameBarActive As Boolean = GameBarDetector.IsGameBarEnabled()
    Dim isInputRedirected As Boolean = GameBarDetector.IsInputRedirected(Me.Handle)

    MessageBox.Show($"Game Bar状态：{If(isGameBarActive, "已开启", "未开启")}{vbCrLf}输入重定向：{If(isInputRedirected, "是", "否")}")
End Sub

测试说明 #

1. 检测Game Bar开启状态：按下Win+G打开Game Bar，调用方法后返回值应为True。
2. 检测输入重定向：在Game Bar中启动录制或截屏功能，目标窗口的IsInputRedirected方法会返回True。
3. 兼容性：windows.gaming.ui.dll仅存在于Windows 10 1607及以上版本，代码已处理DLL未找到的异常，可兼容旧系统。

内容的提问来源于stack exchange，提问作者smoorke