In the annual employment report calculation (script CALBIL1), it is possible to intervene in many actions accessible via the SPECALBIL script provided for that purpose.
You can refer to the generated standard source: WWBILSOC.
$ACTION
Case ACTION
When "LECTURE": Gosub LECTURE
When "CALCUL" : Gosub CALCUL
When ...
Endcase
Return
$LECTURE
#Specific code
Return
$CALCUL
#Specific code
Return