WINDEV (3 replies)

Can anyone please explain what does below code do?

NumCmd =""
SI Gauche(WBS,3) ="FR-" ALORS
NumCmd = Milieu(WBS,4,7)
TableauCode = Milieu(WBS,12,4)
FIN
SI Gauche(WBS,6) ="XX-01-" OU Gauche(WBS,6) ="ZZ-01-" ALORS
NumCmd = Milieu(WBS,7,6)
TableauCode = Milieu(WBS,14,4)
FIN

I'm not able to understand it as I'm new to WINDEV.