C# WPF获取任务栏时间区域的Rectangle

[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;
}