I want to call the program RSUSR003, which is also a transaction in itself, from SAP. So, i believe i have to use a custom BAPI, as no single BAPI exists for that program or is unclear to me. The ABAPer advised to have a custom BAPI.
So, i wan to know, how to call a BAPI. I will browse through many more threads in this community, to find the correct answer. But no luck so far. The below link is invalid.