Using Programming Languages other than VBA

Sub Example_Knots()
   ' This example creates a Spline object in model space and
   ' returns the knot vector for the new Spline

	Dim splineObj As AcadSpline
	Dim startTan(0 To 2) As Double, endTan(0 To 2) As Double
	Dim fitPoints(0 To 8) As Double
	Dim knotVector As Variant

	' Define the Spline object
	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

	' Create new Spline object
	Set splineObj = ThisDrawing.ModelSpace.AddSpline(fitPoints, startTan, endTan)
	ThisDrawing.Application.ZoomAll

	' Display the knot vector of the new Spline
	knotVector = splineObj.Knots
	MsgBox "The knot vector of the new Spline is: " & vbCrLf & _
											knotVector(0) & vbCrLf & _
											knotVector(1) & vbCrLf & _
											knotVector(2)
End Sub