Using Programming Languages other than VBA

Sub Example_CreateBackup()
	' This example returns the current setting of
	' CreateBackup. It then changes the value, and finally
	' it resets the value back to the original setting.

	Dim preferences As AcadPreferences
	Dim currCreateBackup As Boolean

	Set preferences = ThisDrawing.Application.preferences

	' Retrieve the current CreateBackup value
	currCreateBackup = preferences.OpenSave.CreateBackup
	MsgBox "The current value for CreateBackup is " & preferences.OpenSave.CreateBackup, vbInformation, "CreateBackup Example"

	' Change the value for CreateBackup
	preferences.OpenSave.CreateBackup = Not (currCreateBackup)
	MsgBox "The new value for CreateBackup is " & preferences.OpenSave.CreateBackup, vbInformation, "CreateBackup Example"

	' Reset CreateBackup to its original value
	preferences.OpenSave.CreateBackup = currCreateBackup
	MsgBox "The CreateBackup value is reset to " & preferences.OpenSave.CreateBackup, vbInformation, "CreateBackup Example"
End Sub

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