uPriority (USHORT)
The job-priority range is 1 through 99, with 99 the highest job priority. (For queue priorities, 1 is the highest priority.)
The job priority determines the order of jobs in the queue. If multiple queues print to the same printer, the job at the front of each queue is examined. The job with the highest priority is printed first; if there is more than one job with the highest priority, the oldest job with this priority is printed first.
PRJ_MAX_PRIORITY