When you write a script for a descendent object or control, you can call scripts written for any ancestor. You can refer by name to any ancestor of the descendent object in a script, not just the immediate ancestor (parent). To reference the immediate ancestor (parent), you can use the Super reserved word.
For more information about calling scripts for an event in an ancestor window, user object, or menu, and about the Super reserved word, see the PowerScript Reference in the online Help.