Events in ABAP Transations

ABAP Transactions have 4 Events, Those are

• 1. PBO --> Process Before Output
• 2. PAI --> Process After Input
• 3. POV --> Process on value Request
• 4. POH --> Process on Help Request

PBO : PBO Triggers before Screen displays.

PAI : PAI Triggers After Screen display.

POV : POV Triggers with "F4" Function key (It is for Search help).

POH : POH Triggers with F1 Function key (It is to maintain Documentation).

Flow Logic by default have PBO and PAI based on these 2 events it maintains communication.