Using Programming Languages other than VBA

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

	Dim preferences As AcadPreferences
	Dim currTempFileExtension As String

	Set preferences = ThisDrawing.Application.preferences

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

	' Change the value for TempFileExtension
	preferences.OpenSave.TempFileExtension = "@@@"
	MsgBox "The new value for TempFileExtension is " & preferences.OpenSave.TempFileExtension, vbInformation, "TempFileExtension Example"

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