Key Steps 

When calling a .NET program from an SAP system, we distinguish the following key steps, as shown above:

·         The .NET program must register itself on the SAP gateway host

·         The SAP system and the .NET program must implement the same method interface, for example, the function module name and parameters from the SAP system.

·         The SAP system initiates the call to the .NET program using the CALL FUNCTION DESTINATIONkeyword

·         The .NET program must return the appropriate parameters to the SAP system

The SAP server code that is generated by the connector and provides the functionality described above as well as a default implementation. This allows the Visual Studio developer to focus on the implementation and not have to understand how RFC servers work in detail.