[RESOLVED] IsDBNull With DataReader

I need to set null instances of my records to "Contact Us" in a VB app.

Here are my Dims...

Dim contactText As String = "Contact School"
Dim myData(7) As String

There's already a global datareader I'm tapping into to get queries so I'm stuck with a datareader and trying this:

myData(0) = IIf(dr.IsDBNull(0), contactText, CStr(dr.GetValue(0)))

This seems to work but is a lot of extra code and it makes no sense that IIf would not work to me...
If dr.IsDBNull(0) Then
myData(0) = contactText
Else
myData(0) = CStr(dr.GetValue(0))
End If

Read http://www.vbforums.com/showthread.php?t=394527 but couldn't figure it out.

The error I get is: dr.IsDBNull(0): 'dr.IsDBNull' is not declared or the module containing it is not loaded in the debugging session.

Thanks for any clues,
Andrew