How to find out Enhancement details for Sales Order

Question

Hello,
Follwing is the scenerio:
As soon as Third Party Sales Order created, Header Billing block gets triggered (from Sales Doc settings in VOV8).
In Sales Order there are 4 items of items:
1. Hardware Material (Price) with Item Category, say A
2. Hardware Material (Free-of-Charge) with item category, say B
3. Service Material (Price) with Item Category, say C
4. Service Material (Free-of-Charge) with item category, say D
Now there is another billing block, at item level, for Hardware Material (Price) - item cat. A, ONLY.
I checked item cat. in VOV7, and this block is not configured there.
Sales Order saved (with pop-up message - Maintain Serial No. for Material, but as it's third party Order, stock is not in Inventory, so no Serial number at this point of time). PR triggered upon saving the Order. from PR, PO gets generated,and then MIRO.
Now, as vendor Invoice received with Stock details (Manufacturer's Serial No.), we go to VA02 and maintain Serial No. (Extra --> Serial No.) for all 4 types of material (Pls note that Billing block is for Hardware Price Material, but we need to maintain Serial No. for all 4 types of material) and save order.
As soon as, serial no. maintained, item level billing block gets removed for Hardware (price) material, automatically.
I need to understand how this functionality has been achieved?
More precisely how and where i can see the technical details, like What program is being developed, which user-exit is being used etc...
Thanks.

Answer 1

Hi Sumitra,
Since the system exit handler has to call your BADI  go to SE24 and display
CL_EXITHANDLER
Chose method get_instance and set a break point.
And, then press F8, so it will show all the Badi's.
Regard's,
Shivesh Ranjan.