[DllImport("user32.dll")] static extern IntPtr GetForegroundWindow(); private IntPtr GetActiveWindow() { IntPtr handle = IntPtr.Zero; return GetForegroundWindow(); } 

然后使用GetWindowRect获取窗口位置。

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 [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect); [StructLayout(LayoutKind.Sequential)] public struct RECT { public int Left; // x position of upper-left corner public int Top; // y position of upper-left corner public int Right; // x position of lower-right corner public int Bottom; // y position of lower-right corner } 

  [DllImport("user32.dll")] private static extern bool SetProcessDPIAware(); [DllImport("user32.dll")] static extern IntPtr GetForegroundWindow(); [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] static extern bool GetWindowRect(IntPtr hWnd, out Rectangle lpRect); static void Main() { SetProcessDPIAware(); Rectangle t2; GetWindowRect(GetForegroundWindow(),out t2); }