Calling an ancestor script – PB Docs 2019

When you write a script for a descendant object or control, you
can call scripts written for any ancestor. You can refer by name to
any ancestor of the descendant 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 section called “Calling
functions and events in an object’s ancestor” in PowerScript Reference.