您可以声明带有自定义服务器控件和用户控件的事件，其方式与声明带有任何A SP。

You can declare events with custom server controls and user controls in the same way you would with any ASP.

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加强反馈。你可使用自定义控件外观和动画反馈给用户事件正确执行或者不正确，或者显示操作进程。

Improve feedback. You can use custom control visuals and animations to give feedback to show that something is being done correctly or incorrectly, or to show progress.

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