Determine if circular face is "open" or "closed"

[ianteneth]

In the screenshot below there are two holes, one is "closed" (a full circle, not on the edge) and the other is "open" (semi-circle on the edge). Using the code below, I am trying to highlight circular faces red, but I don't want the "open" half circle hole to be highlighted. See attached part file to help testing.

How can I differentiate between the two circular faces and figure out which one is "open" or "closed"?

Sub Main()
	
	Dim part As PartDocument
	part = ThisDoc.Document
	
	Dim style As RenderStyle
    style = part.RenderStyles.Item("red")
	
	For Each face In part.ComponentDefinition.SurfaceBodies.Item(1).Faces
		
	   If Face.SurfaceType = SurfaceTypeEnum.kCylinderSurface Then
		   	Face.SetRenderStyle(kOverrideRenderStyle, style) 
	    End If
		
	Next Face
	
End Sub

[_dscholtes_ · Accepted solution]

You can get the edges of the selected face. If the face is 'closed', I recon the amount should be 2 (the upper and lower circles). If the face is 'open', I recon the amount should be 4 (the upper and lower arc sections and the two vertical edges). 

If Face.Edges.Count = 2 Then
   'face is closed
Else
   'face is open
End