Using Programming Languages other than VBA

Sub Example_Document()
	' This example creates a circle in model space and then
	' finds the name of the document that the circle resides in.
   
	Dim circleObj As AcadCircle
	Dim centerPoint(0 To 2) As Double
	Dim radius As Double

	' Define the circle
	centerPoint(0) = 0#: centerPoint(1) = 0#: centerPoint(2) = 0#
	radius = 5#

	' Create the Circle object in model space
	Set circleObj = ThisDrawing.ModelSpace.AddCircle(centerPoint, radius)
	ZoomAll

	' Find the document name for the circle
	Dim currDoc As AcadDocument
	Set currDoc = circleObj.Document

	MsgBox "The circle resides in: " & currDoc.name
	
End Sub