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Every user action that triggers PAI is assigned a unique function code, with one exception: Choosing Enter triggers PAI and different function codes can be transferred to SY-UCOMM: • If there is an entry in the command field of the standard toolbar, this is transferred to SY-UCOMM as the function code.
System fields are set at the PAI (Process After Input) event for every screen.
These can be also used for interactive list processing, except for SY-DATAR, SY-LOOPC, and SY-STEPL.
Can include, as appropriate, user name and password designators and query strings.
The main part of the address can only have the characters A-Za-z0-9 and -.