| hslp | The language specific SLPHandle on which to register the service. | 
| srvurl | Pointer to the SLP Service URL of the requested service. See Syntax for more information about SLP Service URLs | 
| lifetime | The lifetime of the service in seconds | 
| errcode | An error code indicating if an error occurred during the operation. The callback should check this error code before processing the parameters. | 
| cookie | The same cookie that was passed as a parameter to the SLPFindSrvs() call | 
| OpenSLP 0.6.0 | SLPSrvURLCallback functions are called as specified by RFC 2614 |