Phase 2. Get Rid of Your Message-Handling Switch Statements

In Phase 2, use ClassWizard to create separate message-mapped MFC handler functions for the remaining cases in your message handling switch statements. This lets you use the MFC message map, which causes the appropriate message handler to be called in response to each Windows-based message.

In addition to mapping messages, you can accomplish a couple of other useful things in Phase 2:

• Use MFC's menu command updating mechanism to replace the way you enable/disable or check/uncheck menu items.
• Replace your use of cbWndExtra and cbClsExtra with class member variables.