[2005] Nullable Structures

[syntaxeater]

Visual Studio 2008 introduced a way to specify that you want a nullable instance of a structure with the following:

Option Strict On
Option Explicit On
Public Class Form1
    Private Enum myEnum
        Item1
        Item2
        Item3
    End Enum
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim someValue As myEnum?
        MessageBox.Show(someValue.ToString)
    End Sub
End Class

This is valid regardless of whether you are compiling to 2.0, 3.0 or 3.5. My issue is, the project I am working on is made in visual studio 2005. At this time, we are unable to use visual studio 2008 for development; so I would like to know how this is done in 2.0? I assume it's possible considering I can compile to 2.0 in VS2008 using this syntax.

Thanks.