Using Programming Languages other than VBA

Sub Example_DefaultPlotStyleForLayer()
	' This example reads and modifies the preference value that controls
	' the default plot style assigned to layers.
	' When finished, this example resets the preference value back to
	' its original value.

	Dim ACADPref As AcadPreferencesOutput
	Dim originalValue As Variant, newValue As Variant

	' Get the output preferences object
	Set ACADPref = ThisDrawing.Application.preferences.Output

	' Read and display the original value
	originalValue = ACADPref.DefaultPlotStyleForLayer
	MsgBox "The DefaultPlotStyleForLayer preference is: " & originalValue

	' Toggle and display the DefaultPlotStyleForLayer preference
	If ACADPref.DefaultPlotStyleForLayer = "ByBlock" Then
		ACADPref.DefaultPlotStyleForLayer = "Normal"
	Else
		ACADPref.DefaultPlotStyleForLayer = "ByBlock"
	End If

	newValue = ACADPref.DefaultPlotStyleForLayer
	MsgBox "The DefaultPlotStyleForLayer preference has been set to: " & newValue

	' Reset the preference back to its original value
	'
	' * Note: Comment out this last section to leave the change to
	'		 this preference in effect
	ACADPref.DefaultPlotStyleForLayer = originalValue
	MsgBox "The DefaultPlotStyleForLayer preference was reset back to: " & originalValue
End Sub