Form Designer Actions allow the ability to execute code before and after a form is opened in the designer. The levels include:
•On Before Design Action - executes code before the designer is launched
•On Close Designer Action - executes code after the designer is closed
Form Designer Actions can be defined by selecting "Layout" from the Form Designer menu bar.
A Form Designer Action is geared to be used for initializing variables and creating temporary or permanent tables and views.
Also, when you decide to document your database and application code, remember to document your Actions and Custom EEPs from within the Form Designer.