## Presentation Device Driver Reference for OS/2

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### SplUnRegister Return Value - rc

rc (ULONG) - returns Return codes.

0 Success

ERROR_FILE_NOT_FOUND(2) pszName is not a valid port name.

ERROR_INVALID_HANDLE(6) The value ulHandle is not a valid spooler alert handle.

ERROR_INVALID_PARAMETER(87) An invalid buffer given.

ERROR_NOT_SUPPORTED(50) The spooler on the given print server cannot support alert notification.

PMERR_SPL_NOT_REGISTERED(0x4042) The alert handle ulHandle is not currently registered for any alerts specified by ulCategory and ulType.

PMERR_SPL_SPOOLER_NOT_INSTALLED(0x4009) The spooler is not enabled.