Using Programming Languages other than VBA

Sub Example_Blockttribute()
	' This example creates an MLeader object and gets and sets values for
	' the block attribute type.

	Dim points(0 To 5) As Double

	points(0) = 0: points(1) = 4: points(2) = 0
	points(3) = 1.5: points(4) = 5: points(5) = 0

	Dim i As Long

	Dim oML As AcadMLeader
	Set oML = ThisDrawing.ModelSpace.AddMLeader(points, i)

	oML.ContentType = acBlockContent
	oML.ContentBlockType = acBlockBox

	Dim sBlock As String

	sBlock = oML.ContentBlockName

	Dim o As AcadEntity
	For Each o In ThisDrawing.Blocks(sBlock)
		If o.ObjectName = "AcDbAttributeDefinition" Then
			Call oML.SetBlockAttributeValue(o.ObjectID, "123")
			MsgBox oML.GetBlockAttributeValue(o.ObjectID)
		End If
	Next o
	Update
	ZoomExtents

End Sub