I modified the code from "TheAccess Web" at http://access.mvps.org/access/forms/frm0026.htm
Code:
Private Sub Form_Current()
If Me.NewRecord Then
Me!lblNavigate.Caption = "New Record"
Else
With Me.RecordsetClone
.Bookmark = Me.Bookmark
Me!lblNavigate.Caption = "Record " & .AbsolutePosition + 1 & " of " & .RecordCount
'disable next button if at last record
Me.btnNext.Enabled = ((.AbsolutePosition + 1) <> .RecordCount)
'disable previous button if at first record
Me.btnPrev.Enabled = ((.AbsolutePosition + 1) <> 1)
End With
End If
End Sub