[DllImport("user32.dll")]
        private static extern int FindWindow(string className, string windowText);
        [DllImport("user32.dll")]
        private static extern int FindWindowEx(int hWnd1, int hWnd2, string lpsz1, string lpsz2); 


        private void Button_Click(object sender, RoutedEventArgs e)
        {
            int handle0 = FindWindow("Shell_TrayWnd", null);
            int handle1 = FindWindowEx(handle0, 0, "ReBarWindow32", null);
            int handle2 = FindWindowEx(handle1, 0, "MSTaskSwWClass", null);
            int handle3 = FindWindowEx(handle2, 0, "ToolbarWindow32", null); 

        }