1. Open an Applications Browser or Application Browser.

2. Select the application to which you want to add an extended class.

3. From the Classes menu, select Add > Extension. A window opens, asking you which class you want to extend.

4. Type the class name you want to extend; then select OK.

5. Add one or more methods. Adding methods creates the extension and places the methods into the extension.

1. Open a Classes Browser, Hierarchy Browser, or Class Browser.

2. Select the class you want to extend.

3. From the Classes menu, select Add > Extension. A window opens, listing applications into which the extended class can be placed.

4. Select the containing application; then select OK.

5. Add one or more methods. Adding methods creates the extension and places the methods into the extension.