可以通过按钮为窗体添加主菜单及弹出式菜单，还可以通过按钮逐个删除菜单项，点击部份菜单项还会看到其Click事件响应方法的运行的提示信息-Message can add the main menu and pop-up menu for the form via the button can also delete one by one push of a button menu item, click on the part of the menu items will see the run