Adding a Message Handler

You can use ClassView or the WizardBar to add a message handler (a member function that handles Windows messages) to a control, and map Windows messages to the message handler.

Adding a message handler in ATL is the similar to adding a message handler to an MFC class. See Adding a Message Handler in The Visual C++ Programmer's Guide for more information.

The following conditions apply only to adding an ATL message handler:

• The message handlers follow the same naming convention as MFC.
  
  
• The Add Windows Message Handler option is enabled only if there is a message map in the class definition. Otherwise, this option is disabled.
  
  
• The new message map entries are added into the main message map. The wizard does not recognize alternate message maps and chaining.