Using Programming Languages other than VBA

Sub Example_ArrowHeadBlock()
	' This example creates a radial dimension object in model space
	' and then alters the visible appearance (shape) of the arrowhead
	' using the ArrowHeadBlock property.
	' Use the ArrowHeadBlock property to set the arrowhead to an existing
	' block object containing a custom Circle object

	Dim dimObj As AcadDimRadial
	Dim center(0 To 2) As Double
	Dim chordPoint(0 To 2) As Double
	Dim leaderLen As Integer
	Dim BlockName As String

	' Define the dimension
	center(0) = 0#: center(1) = 0#: center(2) = 0#
	chordPoint(0) = 5#: chordPoint(1) = 5#: chordPoint(2) = 0#
	leaderLen = 5

	' Create the radial dimension in model space
	Set dimObj = ThisDrawing.ModelSpace.AddDimRadial(center, chordPoint, leaderLen)
	ZoomAll

	' Set arrowhead type to user-defined to allow
	' the use of a block as the new arrowhead
	'dimObj.ArrowheadType = acArrowUserDefined
	dimObj.ArrowheadBlock = "CBlock"
	ZoomAll

	' Read and display current arrowhead block name
	BlockName = dimObj.ArrowheadBlock

	MsgBox "The arrowhead block name for this object is: " & BlockName

End Sub