automatically batch insert in Goods Reciept at the openning process order

Hi Expert,

My production life have 5 steps.

1 Formulation step -> 2 Filling step -> 3 Inspection step -> 4 Labelling step -> finally 5 Packing step

In first step, usually i input Goods Reciept Batch in COR2 manually.

And step 2 - 4 i want system automatically crete batch in Goods Reciept at the openning process order.

I think I want to create an exit program for this problem.

Can you tell me your idea for this.

thank you,

thanapong b.