In ABAP/4, the event immidiately begins when the program is running. In general, these events is normally used in the report:
- INITIALIZATION
This is the first event when the report generated. We can modify default value of selection screen.
- AT SELECTION-SCREEN
If we want to verify input data before executing program, we will use this event. This event is triggered when user press Enter.
- START-OF-SELECTION
This event is activated at the main process when the program is executed.
- END-OF-SELECTION
This event is activated follow on START-OF-SELECTION event.
- TOP-OF-PAGE
We use this event for page heading report.
- END-OF-PAGE
We use this event for page footer report.
- AT LINE-SELECTION
When user double-click the line, this event will be activated.
- AT USER-COMMAND
This event will be activated when user exexutes a function within menu
