SAP ABAP-AT SELECTION-SCREEN Event, Example With Output.
At Selection-Screen Event gets triggered right after the Initialization event. This event is basically used to validate fields present in selection screen. Through this event, checks can be incorporated on selection screen fields and appropriate message can be sent back to the screen/user. In simple words, when the user enters the value in the fields of the selection screen and executes it , AT SELECTION-SCREEN event gets triggered. It is used to check or validate the values entered by the user for the fields on selection screen. Authority checks can also be performed in this event. This event gets triggered in two ways: When the user enters the value in the fields of selection screen and executes it (F8). When the user enters the “ENTER” BUTTON on the selection screen. DIFFERENT TYPES OF AT SELECTION-SCREEN EVENTS (In order of execution): At Selection-Screen Output. At Selection-Screen On Value Request For <Field>. At Selection-Screen On Help Request For ...