If you need your dialog box to handle Windows messages, override the appropriate handler functions. To do so, use ClassWizard to map the messages to the dialog class. This writes a message-map entry for each message and adds the message-handler member functions to the class. Use the Visual C++ source code editor to write code in the message handlers.
You can also override member functions of and its base classes, especially .
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See Also Life Cycle of a Dialog Box