Using Programming Languages other than VBA

Sub Example_AppendVertex()
	' This example creates a polyline in model space.
	' It then appends a vertex to the polyline.

	Dim plineObj As AcadPolyline
	Dim points(0 To 14) As Double


	' Define the 2D polyline points
	points(0) = 1: points(1) = 1: points(2) = 0
	points(3) = 1: points(4) = 2: points(5) = 0
	points(6) = 2: points(7) = 2: points(8) = 0
	points(9) = 3: points(10) = 2: points(11) = 0
	points(12) = 4: points(13) = 4: points(14) = 0
	
	' Create a lightweight Polyline object in model space
	Set plineObj = ThisDrawing.ModelSpace.AddPolyline(points)
	ZoomAll
	MsgBox "Append the vertex 4, 1, 0.", , "AppendVertex Example"

	Dim newVertex(0 To 2) As Double
	newVertex(0) = 4: newVertex(1) = 1: newVertex(2) = 0
	plineObj.AppendVertex newVertex
	ZoomAll
	MsgBox "The vertex 4, 1, 0 as been appended.", , "AppendVertex Example"

End Sub