BIDI_NOTIFY_ENDJOBCONNECT(20h) notifies the port driver that a job connection is not needed. The spooler sends this command to notify the port driver that no jobs are waiting for confirmation from the printer.

BIDI_NOTIFY_ENDJOBCONNECT(20h) allows the port driver to know when the spooler is not currently using the printer for print jobs. It does not imply that the spooler will not use the printer again in the near future.