Using Programming Languages other than VBA

Public WithEvents ACADApp As AcadApplication	' Use with Application Event Examples

Sub Example_AcadApplication_Events()
	' This example intializes the public variable (ACADApp) which will be used
	' to intercept AcadApplication Events
	'
	' The VBA WithEvents statement makes it possible to intercept an generic object
	' with the events associated with that object.
	'
	' Before you will be able to trigger any of the AcadApplication events,
	' you will first need to run this procedure.

	' We could get the application from the ThisDocument object, but that would
	' require having a drawing open, so we grab it from the system.
	Set ACADApp = GetObject(, "AutoCAD.Application.16")
End Sub

Private Sub ACADApp_SysVarChanged(ByVal SysvarName As String, ByVal newVal As Variant)
	' This example intercepts an Application SysVarChanged event.
	'
	' This event is triggered when the value of a system variable is changed.
	'
	' To trigger this example event:
	'	 1) Make sure to run the example that initializes
	'	 the public variable (named ACADApp) linked to this event.
	'
	'	 2) Change the value of a system variable in AutoCAD.
	'	 For example: Type GRIDMODE on the command line and toggle the grid display on/off

	' Use the "SysvarName" and "newVal" variables to determine which
	' system variable has changed and its new value.
	MsgBox "The system variable " & SysvarName & " was just changed to: " & newVal
End Sub