The TSPI_lineGetCallAddressID function retrieves the address identifier for the indicated call.
LONG TSPI_lineGetCallAddressID(
HDRVCALL hdCall,
LPDWORD lpdwAddressID
);
Returns zero if the function succeeds or an error number if an error occurs. Possible return values are as follows:
LINEERR_NOMEM, LINEERR_OPERATIONFAILED, LINEERR_OPERATIONUNAVAIL, LINEERR_RESOURCEUNAVAIL.
If the service provider models lines as "pools" of channel resources and does inverse multiplexing of a call over several address identifiers it should consistently choose one of these address identifiers as the primary identifier reported by this function and in the LINECALLINFO data structure.
This function has no direct correspondence at the TAPI level. It gives TAPI sufficient information to implement the lineGetNewCalls function invoked with the LINECALLSELECT_ADDRESS option.