对于简单的示例，使用一个按钮控件。

For the simple example, you use a button control.

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这一技术同样应用到了控件上(如按钮)，尽管实际上有一个三状态选择框看起来更有用些。

The same also applies to controls (such as Buttons), although practically the ability to have a three-state checkbox is likely to be more directly useful.

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除用户选择区之外，还有一个包含控件按钮和预览窗格的部分。

In addition to the user selection area, there is a section containing the control buttons and a preview pane.

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