您必须键入一些输入，单击按钮控件，直观验证结果消息，并将结果记录到 Excel 电子表格或其他数据存储中。
You'd have to enter some inputs, click the button control, visually verify the result message, and record the result into an Excel spreadsheet or other data store.
单击按钮控件后，将会显示一个消息，如图12所示。
When the button control is clicked, a message displays as shown in figure 12.
当实际用户单击按钮时，它会生成一个Windows消息，该控件对该消息进行处理，并将其转换成托管事件。
When a real user clicks on a button it generates a Windows message which is processed by the control and turned into a managed event.
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