Using Programming Languages other than VBA

Sub Example_AddExtrudedSolidAlongPath()
	' This example extrudes a solid from a region
	' along a path defined by a spline.
	' The region is created from an arc and a line.

	Dim curves(0 To 1) As AcadEntity

	' Define the arc
	Dim centerPoint(0 To 2) As Double
	Dim radius As Double
	Dim startAngle As Double
	Dim endAngle As Double
	centerPoint(0) = 5#: centerPoint(1) = 3#: centerPoint(2) = 0#
	radius = 2#
	startAngle = 0
	endAngle = 3.141592
	Set curves(0) = ThisDrawing.ModelSpace.AddArc(centerPoint, radius, startAngle, endAngle)

	' Define the line
	Set curves(1) = ThisDrawing.ModelSpace.AddLine(curves(0).startPoint, curves(0).endPoint)
	
	' Create the region
	Dim regionObj As Variant
	regionObj = ThisDrawing.ModelSpace.AddRegion(curves)

	' Define the extrusion path (spline object)
	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

	' Define the Spline Object
	startTan(0) = 10: startTan(1) = 10: startTan(2) = 10
	endTan(0) = 10: endTan(1) = 10: endTan(2) = 10
	fitPoints(0) = 0: fitPoints(1) = 10: fitPoints(2) = 10
	fitPoints(0) = 10: fitPoints(1) = 10: fitPoints(2) = 10
	fitPoints(0) = 15: fitPoints(1) = 10: fitPoints(2) = 10
	Set splineObj = ThisDrawing.ModelSpace.AddSpline(fitPoints, startTan, endTan)

	' Create the solid
	Dim solidObj As Acad3DSolid
	Set solidObj = ThisDrawing.ModelSpace.AddExtrudedSolidAlongPath(regionObj(0), splineObj)
	ZoomAll

End Sub