Information regarding updating process code

Hello,

I am looking for information for updating the Process codes (Inbound Delivery, ex I004 Reject inbound delivery ) can be set for multiple deliveries. Looking for FM or a report program which can be used to update..

Tried BDC method but can't be used to update the data.. Is there any other way, BAPI or a report program which can set the desired process code by executing the report/FM.

Thanks,

Puneet