C# WPF获取任务栏时间区域的Rectangle

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[StructLayout(LayoutKind.Sequential)]         public struct WindowRect         {             public int left;             public int top;             public int right;             public int bottom;         }           [DllImport("user32.dll")]         private static extern IntPtr FindWindow(string ClassName, string WindowName);           [DllImport("user32.dll")]         private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string className, string windowName);           [DllImport("user32.dll")]         private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);           [DllImport("user32.dll")]         static extern bool GetWindowRect(HandleRef hwnd, out WindowRect rect);           const int SW_HIDE = 0;         const int SW_SHOW = 5;             [DllImport("user32.dll")]         static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);           public MainWindow()         {             InitializeComponent();             this.Loaded += MainWindow_Loaded;         }           private void MainWindow_Loaded(object sender, RoutedEventArgs e)         {             IntPtr taskBarWnd = FindWindow("Shell_TrayWnd", null);             IntPtr tray = FindWindowEx(taskBarWnd, IntPtr.Zero, "TrayNotifyWnd", null);             IntPtr trayclock = FindWindowEx(tray, IntPtr.Zero, "TrayClockWClass", null);             WindowRect rect;             GetWindowRect(new HandleRef(Application.Current.MainWindow, trayclock), out rect);             //this.Top = rect.top;             //this.Left = rect.left;             //this.Width = rect.right - Left;             //this.Height = rect.bottom - rect.top;             //this.Topmost = true;                    }