Question:
how do u use a call transaction function in a bapi while linkin it to an external system..for eg. an ASP screen..?
Answer:
What you want to achieve here...?
You want to call SAP BAPI via 3rd party...? VB? Java? C...
?
You do not need to care for them as this is their job to get it done. While in SAP as long as the BAPI is fully created, you just need to pass the object name and related parameters to them. Story end.
While if you are the 3rd party guy then you better resign and not to continue. This is the question you should to ask your colleague but not here.