Public Function AttachExternalReference( _
   ByVal PathName As String, _
   Optional ByVal Name As String = "", _
   Optional ByVal InsertionPoint As Point = 0, _
   Optional ByVal XScale As Double = 1, _
   Optional ByVal YScale As Double = 1, _
   Optional ByVal ZScale As Double = 1, _
   Optional ByVal Rotation As Double = 0, _
   Optional ByVal bOverlay As Boolean = False _
) As ExternalReference