Adding a Member Function (Visual C++)
In Class View, you can add a member function to any class. When you do this, a declaration is added to the header file, and a stub member-function body is added to the class's implementation file, which you can then modify.
To add a member function to a class
In Class View, expand the project node to display the classes in the project. (To open Class View, on the menu bar, choose View, Class View.)
Open the shortcut menu for the class you want to add a member function to, and then choose Add, Add Function.
Provide the appropriate details about the member function. For more information, see Add Member Function Wizard.
Choose the Finish button to generate the member function code.