Using Programming Languages other than VBA

Sub Example_GetInvisibleEdge()
	' This example creates a 3D face in model space.
	' It then toggles the visibility of the  first edge.

	Dim faceObj As Acad3DFace
	Dim point1(0 To 2) As Double
	Dim point2(0 To 2) As Double
	Dim point3(0 To 2) As Double
	Dim point4(0 To 2) As Double

	' Define the four coordinates of the face
	point1(0) = 1#: point1(1) = 1#: point1(2) = 0#
	point2(0) = 5#: point2(1) = 1#: point2(2) = 1#
	point3(0) = 1#: point3(1) = 10#: point3(2) = 0#
	point4(0) = 5#: point4(1) = 5#: point4(2) = 1#

	' Create the 3DFace object in model space
	Set faceObj = ThisDrawing.ModelSpace.Add3DFace(point1, point2, point3, point4)
	ZoomAll

	' Find the current visibility status of the first edge of the face
	Dim visStatus As Boolean
	visStatus = faceObj.GetInvisibleEdge(0)
	MsgBox "The first face is currently " & IIf(faceObj.GetInvisibleEdge(0), "visible.", "invisible."), , "GetInvisibleEdge Example"

	' Toggle the visibility of the first edge of the face
	faceObj.SetInvisibleEdge 0, Not (visStatus)
	ThisDrawing.Regen False
	MsgBox "The first face is now " & IIf(faceObj.GetInvisibleEdge(0), "visible.", "invisible."), , "GetInvisibleEdge Example"

End Sub