Using Programming Languages other than VBA

Sub Example_Reverse()
	' This example creates a spline in model space.
	' It then reverses the spline and therefore the
	' control point data.

	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
	Dim msg As String

	startTan(0) = 0.5: startTan(1) = 0.5: startTan(2) = 0
	endTan(0) = 0.5: endTan(1) = 0.5: endTan(2) = 0
	fitPoints(0) = 0: fitPoints(1) = 0: 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
	GoSub GETPOINTS
	MsgBox "Before the reverse the first control point is " & msg

	' Reverse the Spline and therefore control point data
	splineObj.Reverse

	ThisDrawing.Regen True
	GoSub GETPOINTS
	MsgBox "After the reverse the first control point is " & msg

	Exit Sub

GETPOINTS:
	msg = ""
	' Get the coordinates from the first control point again
	Dim count As Integer
	For count = 0 To 2
		msg = msg & splineObj.GetControlPoint(0)(count) & ", "
	Next
	msg = VBA.Left(msg, Len(msg) - 2)
	Return

End Sub