private void Form1_Load(object sender, EventArgs e){  //添加菜單一   ToolStripMenuItem subItem;  subItem = AddContextMenu("入庫", menuStrip1.Items, null);  //添加子菜單   AddContextMenu("添加入庫", subItem.DropDownItems, new EventHandler(MenuClicked));  AddContextMenu("入庫管理", subItem.DropDownItems, new EventHandler(MenuClicked));  //添加菜單二   subItem = AddContextMenu("出庫", menuStrip1.Items, null);  //添加子菜單   AddContextMenu("添加出庫", subItem.DropDownItems, new EventHandler(MenuClicked));  AddContextMenu("出庫管理", subItem.DropDownItems, new EventHandler(MenuClicked));}/// <summary>/// 添加子菜單/// </summary>/// <param name="text">要顯示的文字，如果為 - 則顯示為分割線</param>/// <param name="cms">要添加到的子菜單集合</param>/// <param name="callback">點擊時觸發的事件</param>/// <returns>生成的子菜單，如果為分隔條則返回null</returns>ToolStripMenuItem AddContextMenu(string text, ToolStripItemCollection cms, EventHandler callback){  if (text == "-")  { ToolStripSeparator tsp = new ToolStripSeparator(); cms.Add(tsp); return null;  }  else if (!string.IsNullOrEmpty(text))  { ToolStripMenuItem tsmi = new ToolStripMenuItem(text); tsmi.Tag = text + "TAG"; if (callback != null) tsmi.Click += callback; cms.Add(tsmi); return tsmi;  }  return null;}void MenuClicked(object sender, EventArgs e){　　 　 //以下主要是動態生成事件并打開窗體　　　　//((sender as ToolStripMenuItem).Tag)強制轉換  ObjectHandle t = Activator.CreateInstance("WinForms", "WinForms.Form2");  Form f = (Form)t.Unwrap();  f.ShowDialog();}