I am trying to add a function to my modules .vb code that I can call from the matching .ascx and I am having serious [probably mental] issues getting it to work:

.vb:

    Partial Public Class TestClass
        Inherits DotNetNuke.Entities.Modules.PortalModuleBase
        Implements DotNetNuke.Entities.Modules.IActionable
        .
        .
        .

        Public Function LimitString(ByVal sVal As System.String)
            If sVal.Length > 100 Then
                sVal = sVal.Substring(0, 100)
                sVal = sVal & "..."
            End If

            return sVal       
        End Function

    End Class

End Namespace

Then, in my .ascx I have (with a bunch of other code):
<%# LimitString(DataBinder.Eval(Container.DataItem,"test")) %>

I just get red text telling me that the module failed to load...  What am I doing wrong?

-Shaun

PS. I have also tried:
<%# Test.DNN.Modules.TestMod.TestClass.LimitString(DataBinder.Eval(Container.DataItem,"test")) %>

but removed it, since the .ascx should already be using the matching .vb files namespace.