Reset availability check for PM orders

Hello,

I want to reset availabilty check for PM orders by program for a selection of orders (availabilty check create by transaction 'IW32')

I have seen in my tests, if i set RESB-VMENG to '0' it's Ok but I hesitate to modify RESB table directly by programm.

DO you know a module function or a programm for reset avaibility check or to reset these quantity in RESB.

Thank you for advance for your help.

Regards