主要完整地介绍了关于动态创建窗体和控件，以及实现了控件的复制，粘贴，撤销，重做等重要的通用的功能。-A complete descr iption of the main dynamic creation on the form and control, and the achievement of the control copy, paste, undo and redo and other important common features.

网上订餐，预定，撤销，修改，后台管理订单，浏览，注册等-Online ordering, reservations, revoked, modified, Manage orders, browse, registration, etc.