Events in a Classical and Interactive Report

The following Events we use in Calssical Report
1) INITIALIZATION
2) AT SELECTION- SCREEN
AT SELECTION-SCREEN ON FIELD
AT SELECTION-SCREEN OUTPUT
AT SELECTON-SCREEN ON VALUE REQUEST
AT SELECTON-SCREEN ON HELP REQUEST
3) START-OF-SELECTION
4) END-OF-SELECTION
5)TOP-OF-PAGE
6)END-OF-PAGE
These Events are reguraly used by ABAPer while he generate a classical report.