For menu-driven applications that are more than two levels deep, it is important to provide a way for users to quickly jump from a deeply nested frame to the application's top frame. This appendix shows how you can use 4GL to implement this in an ABF or Vision application.

This method utilizes return codes to communicate between calling ("parent") and called ("child") frames. For the application user, selecting the menu item, Top, returns the application to the Top frame without displaying any intervening forms on the way up.