Initialization : triggered when the report is loaded in memory.
At selection-screen output : triggered when the selection screen is loaded in memory before being displayed
Anm.: or in case user-command option is used for parameter and value of parameter is changed
At selection-screen on <field> : before leaving the selection screen.
start-of-selection : the first event for displaying the report.
end-of-selection : after the start-of-selection is completed.
classiscal report events:
top-of-page : every time a new page is started in the list.
end-of-page : every time the list data reaches the footer region of the page.
interactive report events:
top of page during line selection : top of page event for secondary list.
at line-selection : evey time user dbl-clicks(F2) on the list data.
at pF<key> : function key from F5 to F12 to perform interactive action on the list.