Yes, I can see only a one add-on which is from a third party vendor for barcode scanning.
I'm still interested to understand this technical framework ( as per my original query)
1. how do I know which program triggers the calling of the above add-on ?
2. for custom developed reports - how do I see the SQL program source codes and where (which folder in my SQL server) it is stored for reports. please note this is only for my clients customized reports. not the standard SAP reports/queries. my requirement is to make a slight modification (column heading change to the report) to an existing customized reports.
Thanks.