这是通过快捷菜单控件的自定义设计器来实现的。
That is the effect of a custom designer for the ContextMenu control.
本文将讨论一些初级和高级技巧，包括将事件处理程序添加到自定义控件，以及配置控件的外观和行为。
It introduces techniques for adding event handlers to a custom control, as well as advanced techniques for configuring the control's presentation and behavior.
只用三行代码就创建一个登录页面确实很轻巧，但是一般来说，你需要根据你的程序来自定义登录控件的一些特性。
It's neat to be able to create a login page with three lines of code, but generally speaking, you'll want to customize the login control a bit to suit your application.
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