一般情况下，没有必要重载成员函数GetSite 。
Usually there's no need to override the GetSite member function.
具有同一名字的成员函数和非成员函数不会相互重载。
Member and nonmember functions with the same name do not overload one another.
大多数重载操作符可以定义为普通非成员函数或类的成员函数。
Most overloaded operators may be defined as ordinary nonmember functions or as class member functions.
一个可能的方法是重载CMDIChildWnd类的ActivateFrame成员函数，从中为选择所需的工具栏向主框架发送一个消息。
A possible way is to override the ActivateFrame member function of CMDIChildWnd and from there to send a message to the main frame for selecting the required toolbar.
一个可能的方法是重载CMDIChildWnd类的ActivateFrame成员函数，从中为选择所需的工具栏向主框架发送一个消息。
A possible way is to override the ActivateFrame member function of CMDIChildWnd and from there to send a message to the main frame for selecting the required toolbar.
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