开源控件OutlookBar左边菜单怎样获得点击事件?

 public partial class Form1 : Form
    {

        private OutlookBar outlookBar1 = null;

        public Form1()
        {
            InitializeComponent();

            InitializeOutlookbar();
        }

        private void InitializeOutlookbar()
        {
            outlookBar1 = new OutlookBar();

            OutlookBarBand oneBand = new OutlookBarBand("水果");
            oneBand.SmallImageList = this.imageList1;
            oneBand.LargeImageList = this.imageList1;
            oneBand.Items.Add(new OutlookBarItem("苹果", 0));
            oneBand.Items.Add(new OutlookBarItem("梨子", 1));
            oneBand.Items.Add(new OutlookBarItem("香蕉", 2));
            oneBand.Items.Add(new OutlookBarItem("橘子", 3));

            oneBand.Background = SystemColors.AppWorkspace;
            oneBand.TextColor = Color.White;
            outlookBar1.Bands.Add(oneBand);


            OutlookBarBand twoBand = new OutlookBarBand("蔬菜");
            twoBand.SmallImageList = this.imageList1;
            twoBand.LargeImageList = this.imageList1;
            twoBand.Items.Add(new OutlookBarItem("白菜", 0));
            twoBand.Items.Add(new OutlookBarItem("豆腐", 1));
            twoBand.Items.Add(new OutlookBarItem("茄子", 2));
            twoBand.Items.Add(new OutlookBarItem("子姜", 3));

            twoBand.Background = SystemColors.AppWorkspace;
            twoBand.TextColor = Color.White;
            outlookBar1.Bands.Add(twoBand);

            OutlookBarBand threeBand = new OutlookBarBand("糕点");
            threeBand.SmallImageList = this.imageList1;
            threeBand.LargeImageList = this.imageList1;
            threeBand.Items.Add(new OutlookBarItem("凤尾酥", 0));
            threeBand.Items.Add(new OutlookBarItem("南瓜饼", 1));
            threeBand.Items.Add(new OutlookBarItem("桂花糕", 2));
            threeBand.Items.Add(new OutlookBarItem("双河凉糕", 3));

            threeBand.Background = SystemColors.AppWorkspace;
            threeBand.TextColor = Color.White;
            outlookBar1.Bands.Add(threeBand);

            OutlookBarBand fourBand = new OutlookBarBand("电影");
            fourBand.SmallImageList = this.imageList1;
            fourBand.LargeImageList = this.imageList1;
            fourBand.Items.Add(new OutlookBarItem("敢死队", 0));
            fourBand.Items.Add(new OutlookBarItem("功夫", 1));
            fourBand.Items.Add(new OutlookBarItem("英雄", 2));
            fourBand.Items.Add(new OutlookBarItem("V字仇杀队", 3));

            fourBand.Background = SystemColors.AppWorkspace;
            fourBand.TextColor = Color.White;
            outlookBar1.Bands.Add(fourBand);

            outlookBar1.Dock = DockStyle.Fill;

            this.panel1.Controls.AddRange(new Control[] { outlookBar1 });
            outlookBar1.FlatArrowButtons = true;

            //outlookBar1.FlatArrowButtons　=　true;在窗体属性中操作,这里是自定义的空间，需要写代码
            
            //outlookBar1.ItemDropped += new OutlookBarItemDroppedHandler(OnOutlookBarItemDropped);
            
            outlookBar1.ItemClicked += new OutlookBarItemClickedHandler(OnOutlookBarItemClicked);
            
        }
       
        /// <summary>
        /// 点击事件
        /// </summary>
        /// <param name="band"></param>
        /// <param name="item"></param>
        private void OnOutlookBarItemClicked(OutlookBarBand band,OutlookBarItem item)
        {
            switch (item.Text)
            {
                case "苹果":
                    MessageBox.Show("苹果");
                    break;
                case "梨子":
                    Form2 form2 = new Form2();
                    form2.Show(this.dockPanel1);
                    form2.DockTo(this.dockPanel1, DockStyle.Right);
                    break;
                case "香蕉":
                    Form3 form3 = new Form3();
                    form3.Show(this.dockPanel1);
                    form3.DockTo(this.dockPanel1, DockStyle.Right);
                    break;
                default:
                    break;
            }
        }
在运行此代码，需要引入一个开源控件的Dll
怎样获得点击菜单"水果"、糕点"、电影"事件
OutlookBarBand oneBand = new OutlookBarBand("水果");
OutlookBarBand threeBand = new OutlookBarBand("糕点");
OutlookBarBand fourBand = new OutlookBarBand("电影");
现在已经能获得点击菜单"水果"的子菜单"苹果"、"梨子"、"香蕉"、"橘子".
我的剩余分数不多了，请大哥大姐们帮下忙，帮我解决一下，我都弄了好久了，都没弄出来！！！
谢谢了 --------------------编程问答-------------------- I want to know --------------------编程问答-------------------- 麻烦高手解决一下我的这个问题！！
非常感谢！！！

补充：.NET技术 ,  C#