Using Programming Languages other than VBA

Sub Example_LayoutCreateViewport()
	' This example reads and modifies the preference value that controls
	' the automatic creation of a viewport for new layouts. When finished, this example
	' resets the preference value back to its original value.

	Dim ACADPref As AcadPreferencesDisplay
	Dim originalValue As Variant, newValue As Variant

	' Get the display preferences object
	Set ACADPref = ThisDrawing.Application.preferences.DISPLAY

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

	' Modify the LayoutCreateViewport preference by toggling the value
	ACADPref.LayoutCreateViewport = Not (originalValue)
	newValue = ACADPref.LayoutCreateViewport
	MsgBox "The LayoutCreateViewport 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.LayoutCreateViewport = originalValue
	MsgBox "The LayoutCreateViewport preference was reset back to: " & originalValue
End Sub