call a function with a hyperlink

I am working on a website in asp.net 1.1/vb.net.   I need to use a hyperlink inside a datagrid that will call a function on the code behind. I have come up with this so far:

checkpackage (eval("apartmentid"),eval("packagename"), eval("commname")) is what I am using in the navigateurl part of the databind.

This is the code behind:

Public Function checkpackage(ByVal id As Object, ByVal package As Object, ByVal commname As Object) As String
        If package.ToString() = "aptbasic" Then
            Return "aptbasic.aspx?id=" + id.ToString()
        ElseIf package.ToString = "aptint" Then
            Return "/" + commname.ToString()
        ElseIf package.ToString = "aptult" Then
            Return "/" + commname.ToString()
        ElseIf package.ToString = "singlead" Then
            Return "aptsingle.aspx?id=" + id.ToString()
        ElseIf package.ToString = "multint" Then
            Return "aptmult.aspx?id=" + id.ToString()
        ElseIf package.ToString = "multbasic" Then
            Return "aptsingle.aspx?id=" + id.ToString
        Else
            Return "aptmult.aspx?id=" + id.ToString

        End If
    End Function

I keep getting the error that "eval isn't declared."  I thought you could use eval for this purpose.  Anyone have any idea what I am doing wrong?