winform显示、隐藏任务栏及开始菜单

　　　　　　private const int SW_HIDE = 0; //隐藏
　　　　　　private const int SW_RESTORE = 9;//显示

　　　　　/// <summary>
        /// 获取窗体的句柄函数
        /// </summary>
        /// <param name="lpClassName">窗口类名</param>
        /// <param name="lpWindowName">窗口标题名</param>
        /// <returns>返回句柄</returns>
        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        /// <summary>
        /// 显示任务栏 && 开始菜单
        /// </summary>
        public static void ShowTask()
        {
            //显示任务栏
            ShowWindow((int)FindWindow("Shell_TrayWnd", null), SW_RESTORE);
            //显示系统开始菜单栏按钮
            ShowWindow((int)FindWindow("Button", null), SW_RESTORE);
        }

        /// <summary>
        /// 隐藏任务栏 && 开始菜单
        /// </summary>
        public static void HideTask()
        {
            //隐藏任务栏
            ShowWindow((int)FindWindow("Shell_TrayWnd", null), SW_HIDE);
            //隐藏系统开始菜单栏按钮
            ShowWindow((int)FindWindow("Button", null), SW_HIDE);
        }