托盘

        #region 全局变量
        //创建NotifyIcon对象 
        NotifyIcon notifyIcon = new NotifyIcon();
        d.Icon ico = new d.Icon("../../ico/logo_x.ico");
        d.Image img = null;
        ContextMenuStrip conTextMenuStrip = new ContextMenuStrip();
        List<ToolStripMenuItem> toolStripMenuItem = new List<ToolStripMenuItem>();
        const string Red = "Red";
        const string Green = "Green";
        const string Blue = "Blue";
        const string Yellow = "Yellow";
        #endregion

        #region 加载
        public DelegateControlUpdateOne()
        {
            InitializeComponent();
            //加载图片 
            notifyIcon.Icon = ico;
            //隐藏任务栏区图标 
            this.ShowInTaskbar = false;
            //图标显示在托盘区 
            notifyIcon.Visible = true;
            //添加托盘菜单项 
            conTextMenuStrip.ShowImageMargin = true;
            img = d.Image.FromFile("../../ico/logo_x.ico");
            CreateItem("红色", Red);
            CreateItem("蓝色", Blue);
            CreateItem("绿色", Green);
            CreateItem("黄色", Yellow);
            conTextMenuStrip.Items.AddRange(toolStripMenuItem.ToArray());
            //托盘菜单项在图标右键时显示  
            notifyIcon.ContextMenuStrip = conTextMenuStrip;
            //委托点击事件
            this.Closed += DelegateControlUpdateOne_Closed;
        }
         #endregion

        #region CreateItem(string text, string tag)
        /// <param name="text">text</param>
        /// <param name="tag">颜色</param>
        void CreateItem(string text, string tag)
        {
            ToolStripMenuItem toolStripMenuitem = new ToolStripMenuItem("白色", img);
            toolStripMenuitem.Click += toolStripMenuitem_Click;
            toolStripMenuitem.Tag = tag;
            toolStripMenuItem.Add(toolStripMenuitem);
        }
        #endregion

        #region 改变颜色
        void toolStripMenuitem_Click(object sender, EventArgs e)
        {
            ToolStripMenuItem item = sender as ToolStripMenuItem;
            if (item == null) return;
            switch (item.Tag.ToString())
            {
                case Red: Hint.Background = Brushes.Red; break;
                case Blue: Hint.Background = Brushes.Blue; break;
                case Yellow: Hint.Background = Brushes.Yellow; break;
                case Green: Hint.Background = Brushes.Green; break;
            }
        }
        #endregion

        #region  清空窗体 DelegateControlUpdateOne_Closed(object sender, EventArgs e)
        void DelegateControlUpdateOne_Closed(object sender, EventArgs e)
        {
            notifyIcon.Dispose();
            notifyIcon = null;
        }
        #endregion