rapi_session Function

int rapi_session(
     struct sockaddr_in *Dest,   /* Session: (Dest addr, port) */
     int         Protid,         /* Protocol Id               */
     int         flags,          /* flags                     */
     int         (*Event_rtn)(), /* Address of callback rtn   */
     void        *Event_arg,     /* App argument to callback  */
     int         *errnop         /* Place to return error code*/
    )