Using Programming Languages other than VBA

Sub Example_Coordinate()
	' This example creates a polyline in model space and
	' queries and changes the coordinate in the first index position.
	
	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

	' Find the coordinate in the first index position
	Dim coord As Variant
	coord = plineObj.Coordinate(0)
	MsgBox "The coordinate in the first index position of the polyline is: " & coord(0) & ", " _
		& coord(1) & ", " & coord(2)

	' Change the coordinate
	coord(0) = coord(0) + 1
	plineObj.Coordinate(0) = coord
	plineObj.Update

	' Query the new coordinate
	coord = plineObj.Coordinate(0)
	MsgBox "The coordinate in the first index position of the polyline is now: " & coord(0) & ", " _
		& coord(1) & ", " & coord(2)

End Sub