How to call the EnumJobs function from a Visual Basic .NET application

The EnumJobs function is available in the Winspool.drv print spool interface. You can use the EnumJobs function to retrieve the status of the jobs that are queued in a local print queue. The EnumJobs function enumerates the number of jobs, the job identification, the job status, and other parameters based on your requirements.

http://support.microsoft.com/kb/821769/en-us