//Select example 1
Select {Customer.Fax}[1 To 3]
   Case "604", "250" :
      "BC"
   Case "206", "509", "360" :
      "WA"
   Default :
      "";
End Select


and


dim value as string
value = "b"

dim value2 as string
value2 = "z"

dim output as string
output = "other"

Select Case value
        Case "a"
                Select Case value2
                        Case "z"
                        output = "a"
                End Select

        Case "b"
                Select Case value2
                        Case "z"
                        Output = "b"
                End Select

End Select

formula = output

To be able to use the same nested Select Case statement in all three versions,
use Basic syntax.