title: Null.SetNull method in DotNetNuke/VB.Net
body: <p>I was looking at some old code in DotNetNuke 4.x/VB.Net and couldn't make anything meaningful out of the following code. I know SetNull method is not part of VB.Net. </p>
  
  <p>What is this code trying to do when Null.SetNull(ExamTrackerId) is called?  </p>
  
  <pre><code>        Private ExamTrackerId As Integer
  
          ' Determine ItemId
          If Not (Request.Params("ExamTrackerID") Is Nothing) Then
              ExamTrackerId = Int32.Parse(Request.Params("ExamTrackerID"))
          Else
              ExamTrackerId = Convert.ToInt32(Null.SetNull(ExamTrackerId))
          End If
  </code></pre>