[Closed] Vertex Channel Numbers

I can see “Num Verts” in the “Map Channel Info” dialog box. But can not get the numbers from maxscript for channels -2,-1,0 (i.e. Alpha, Illun, vc)

This works for anything above 0.

channelVertCount = polyop.getNumMapVerts $ 1

aka something like

channelVertCount = polyop.getNumMapVerts $ -1

Is there a way to get the count for any of the three mentioned above?

Thanks in advance.