SAP Communication: CPI-C Programming
(BC-CST-GW)
In this documentation, you will learn how to implement program-to-program communication between SAP Systems (R/3 or R/2) and with external programs and systems using SAP’s CPI-C interfaces.
CPI-C programming is only required in the following cases:
· Your program communicates with systems that do not support RFC (R/2 before Release 5.0D).
· You want to define your own protocol on the basis of CPI-C.
· You want to change an existing program which contains CPI-C calls.
The Remote Function
Call interface further simplifies the implementation of communication. RFC is
an SAP interface based on CPI-C. For more details on RFC, refer to the documentation
RFC Programming in
ABAP.
For details on
configuration, please refer to the documentation
BC - SAP Communication
Configuration.
The following topics are discussed in this documentation:
Programming under Various Constellations
Asynchronous Data Transfer With Q-API
Conversion Tables EBCIDC from/to ASCII