To call RfcWinInstallFunction, use the calling syntax:
RFC_ONCALL * f_ptr,
char * description);
To implement an RFC server, you must register every callable function with RFC. This allows the RfcDispatch routine to route RFC requests properly. To register callable functions when you are programming in the Windows operating system, use the RfcWinInstallFunction routine.
RFC provides both the RfcInstallFunction and RfcWinInstallFunction routines for registering callable functions. Windows programmers may only use RfcWinInstallFunction; all other programmers can use either routine. The only difference between them is that RfcWinInstallFunction requires a handle parameter.
This function is defined in SAPRFC.H.
Once you have used and registered the function with RfcWinInstallFunction, you can use the RfcDispatch routine to execute RFC requests that come in.
The sample programs provide examples of how to use RfcInstallFunction, and you can use RfcWinInstallFunction in the same way. (In particular, the program rfcexec.c which is included in the RFC SDK implements an RFC server.)