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Call-Back from an ABAP Function ModuleLocate this document in the navigation structure

Use

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;
}