Add another field in the screens of Transaction MB21/MB22/MB23
We have a requirement to add an extra field BDZTP(Time that reservation quantity required) while creating, changing or displaying reservations manually.
We are currently using SAP 4.6c. I tried looking for screen exits and BADIs for the transaction MB21 but couldn't find any in this version. However, I found out that there are BADIs for MB21 in ECC 6 but I still dont know if those BADI's can help me achieve the required result.
The field is available in the table RESB and it is not a customer field. Is there anyway to fulfill this requirement?
Needless to mention, helpful answers will be awarded.