SAP Web AS Interface Action

Hi,

Can anyone plz tell me how to work on <b>SAP Web AS Interface Action</b>. I created SAP Server details for WAS configuration. But when trying to search BAPI using this action, its not retrieving any. Do we need to do any other setting on SAP R/3?

And also plz tell me what is the advantage of using SAP WAS Interface Action.

Thanks in advance

Regards

Muzammil