Using Programming Languages other than VBA

Sub Example_Mirror()
	' This example creates a lightweight polyline
	' and then mirrors that polyline.

	' Create the polyline
	Dim plineObj As AcadLWPolyline
	Dim points(0 To 11) As Double
	points(0) = 1: points(1) = 1
	points(2) = 1: points(3) = 2
	points(4) = 2: points(5) = 2
	points(6) = 3: points(7) = 2
	points(8) = 4: points(9) = 4
	points(10) = 4: points(11) = 1
	Set plineObj = ThisDrawing.ModelSpace.AddLightWeightPolyline(points)
	plineObj.Closed = True
	ZoomAll

	' Define the mirror axis
	Dim point1(0 To 2) As Double
	Dim point2(0 To 2) As Double
	point1(0) = 0: point1(1) = 4.25: point1(2) = 0
	point2(0) = 4: point2(1) = 4.25: point2(2) = 0
	
	MsgBox "Mirror the polyline.", , "Mirror Example"

	' Mirror the polyline
	Dim mirrorObj As AcadLWPolyline
	Set mirrorObj = plineObj.Mirror(point1, point2)

	ZoomAll
	MsgBox "Mirror completed.", , "Mirror Example"

End Sub