How can I tell when a download is complete using SharpBits in VB.NET?

Question

I have a very basic windows forms app. it needs to download some files in the background. How can I tell when the download is done?? Here is what I have:

    Dim bits As New SharpBits.Base.BitsManager
    Dim mynewjob As SharpBits.Base.BitsJob = _
    bits.CreateJob("jobname", SharpBits.Base.JobType.Download)
    mynewjob.AddFile("http://library/test.zip", "c:\test.zip")
    mynewjob.Resume()

thank you