在的子控件的变化(响应用户操作)的状态下，通过捕捉那些发送一些通知消息到它的父窗口，父窗口消息，执行操作。
When the state of a child control changes (in response to a user action), it sends some notification messages to it's parent window, and parent window by catching those messages, performs actions.
通过监控发送到您的复选框控件的父窗口消息(和检查通过鼠标控制)，我注意到有一个WM_COMMAND消息和两个WM_NOTIFY消息。
By monitoring messages sent to the parent window of your check box control (and checking the control by mouse), I noticed one WM_COMMAND message and two WM_NOTIFY messages.
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