[Closed] How to flip UVs in maxscript

Simple enough task!
I couldn’t work it out, without having to employ this ‘orrible method:

 fn  AD_FlipUVs axis =
 (
 	if (selection.count == 1) and (classOf $ == Editable_Poly) and (subObjectLevel == 5) then
 	(
 		subObjectLevel = 4
 	)
 	if (selection.count == 1) and (classOf $ == Editable_Poly) and (subObjectLevel == 4) then
 	(
 		if $.selectedFaces.count > 0 then
 		(
 			selectedPolys = $.EditablePoly.GetSelection #Face
 			modPanel.addModToSelection  (Unwrap_UVW())
 			subObjectLevel = 3
 			$.modifiers[#unwrap_uvw].edit()
 			$.modifiers[#unwrap_uvw].selectFacesByNode selectedPolys $
 			case axis of
 			(
 				"horizontal": $.modifiers[#unwrap_uvw].unwrap.mirrorh()
 				"vertical": $.modifiers[#unwrap_uvw].unwrap.mirrorv()
 				"default": messagebox "invalid axis"
 			)
 			
 			collapseStack $
 			subObjectLevel = 4
 		)
 		else
 		(
 			messagebox "Please select a face"
 		)
 	)
 	else
 	(
 		messagebox "Please select faces on an editable poly object"
 	)
 )
 

Is there a way of flipping UVs without having to apply an unwrap UV modifier?