Call-Back from an ABAP Function Module 

The following programming example shows you how to use this feature:

 

RFC client program		Function module in an SAP system
rfc_rc = RfcOpen(...);		FUNCTION ABC.
rfc_rc = RfcInstallFunction(‘XYZ’, xyz_function,...);
rfc_rc = RfcCallReceive(‘ABC’,...);	----->	...
		CALL FUNCTION ‘XYZ’ DESTINATION ‘BACK’
If(rfc_rc==RFC_CALL)	<-----	...
{
rfc_rc = RfcDispatch(...);
if(rfc_rc!=RFC_OK)
exit(1);	----->	...
}
rfc_rc=RfcReceive(...);	<-----	ENDFUNCTION
...

 

/* RFC function: ‘ABC’ */

static RFC_RC xyz_function(RFC_HANDLE rfc_handle)

{

                                rfc_rc = RfcGetData(...);                /*   Get RFC data  */

                                ...                                      /*   Process RFC data */

                                rfc_rc = RfcSendData(...);               /*   Report result to ABAP   */

   return 0;

}