Using Programming Languages other than VBA

Sub Example_SetControlPoint()
	' This example creates a spline object in model space.
	' It then finds the coordinates of the first control point
	' and changes that value.

	' Create the spline
	Dim splineObj As AcadSpline
	Dim startTan(0 To 2) As Double
	Dim endTan(0 To 2) As Double
	Dim fitPoints(0 To 8) As Double

	startTan(0) = 0.5: startTan(1) = 0.5: startTan(2) = 0
	endTan(0) = 0.5: endTan(1) = 0.5: endTan(2) = 0
	fitPoints(0) = 1: fitPoints(1) = 1: fitPoints(2) = 0
	fitPoints(3) = 5: fitPoints(4) = 5: fitPoints(5) = 0
	fitPoints(6) = 10: fitPoints(7) = 0: fitPoints(8) = 0
	Set splineObj = ThisDrawing.ModelSpace.AddSpline(fitPoints, startTan, endTan)
	ZoomAll

	' Display the coordinates of the first control point
	Dim controlPoint As Variant
	controlPoint = splineObj.GetControlPoint(0)
	MsgBox "Control point 1 is at " & controlPoint(0) & ", " & controlPoint(1) & ", " & controlPoint(2), , "SetControlPoint Example"

	' Change the coordinates of the first fit point
	controlPoint(0) = 0: controlPoint(1) = 3: controlPoint(2) = 0
	splineObj.SetControlPoint 0, controlPoint
	splineObj.Update
	MsgBox "Control point 1 is now at " & controlPoint(0) & ", " & controlPoint(1) & ", " & controlPoint(2), , "SetControlPoint Example"

End Sub