The MFC classes provide enough functionalities for changing the main frame menu bar accordingly to the current active child frame.
为了依照当前活动子框架而改变主框架菜单栏，MFC类提供了充足的函数功能。
The MFC classes provide enough functionalities for changing the main frame menu bar accordingly to the current active child frame.
为了依照当前活动子框架而改变主框架菜单栏，MFC类提供了充足的函数功能。
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