what are the events in Module pool Programming?

Answer Posted / sudheer

In general there are 4 events in module pool programs.Namely
1)PROCESS BEFORE OUTPUT(PBO)
2)PROCESS AFTER INPUT(PAI)
3)PROCESS ON VALUE REQUEST(POV)
4)PROCESS ON HELP REQUEST(POH).
But on 4.x versions onwards the last i.e POV & POH are not
used.

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