To add rejection status (VBAP-ABGRU)

Hello Everyone

I have a requirement as follows.

When the sales document VBELN and item number POSNR has a billing plan FPLNR.

IF the billing plan FPLNR for all items FPLTR are still in open status FKSAF = 'A', then reject the item by inserting rejection status 04.

How do I go with this? Is there a standard function module to add or change the rejection status (VBAP-ABGRU)?