All RFC client programs have to establish an RFC connection to an SAP system:
● The connection can be established via an entry in the sapnwrfc.ini file.
● An RFC function is called by RfcInvoke. After sending the call,
RfcInvoke waits until the returned answer will be received.
The following topics are available:
● Calling a Function in SAP systems
● Passing Structures and Tables
● Executing a Call-Back from an ABAP function module
● Transactional RFC Client Programs