AT SELECTION-SCREEN selscreen_event.
Selection screen events occur immediately before sending a selection screen and after certain user actions on a displayed selection screen. They assist in selection screen processing in the ABAP program.
AT SELECTION-SCREEN is triggered at least twice during actions on selection screens that are linked into another selection screen as a
subscreen - first for the linked selection screen itself, and then for the linking selection screens.
The event blocks after
AT SELECTION-SCREEN are implemented internally as
procedures. Declarative statements in these event blocks create local data.
The program DEMO_SELECTION_SCREEN_EVENTS demonstrates all selection results.