Sub Example_SetControlPoint()
    'Этот пример создает сплайновый объект в пространстве модели.
    'Затем находит координаты первой контрольной точки и изменяет их.

    'Создайте сплайн
    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
    
    'Покажите координаты первой контрольной точки
    Dim controlPoint As Variant
    controlPoint = splineObj.GetControlPoint(0)
    MsgBox "Контрольная точка 1: " & controlPoint(0) & ", " & controlPoint(1) & ", " & controlPoint(2), , "SetControlPoint Пример"
    
    'Измените координаты первой определяющей точки
    controlPoint(0) = 0: controlPoint(1) = 3: controlPoint(2) = 0
    splineObj.SetControlPoint 0, controlPoint
    splineObj.Update
    MsgBox "Контрольная точка 1 - теперь: " & controlPoint(0) & ", " & controlPoint(1) & ", " & controlPoint(2), , "SetControlPoint Пример"
    
End Sub