Public Function AddEx( _
   ByVal RefFace As Object, _
   Optional ByVal vtEdgeNum As Variant, _
   Optional ByRef EdgesArray() As Variant, _
   Optional ByVal vtBRType As Variant, _
   Optional ByVal vtBRWidth As Variant, _
   Optional ByVal vtBRLength As Variant _
) As ConvToSM