Using Programming Languages other than VBA

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

	Dim preferences As AcadPreferences
	Dim currAltFontFile As String
	Dim newAltFontFile As String

	Set preferences = ThisDrawing.Application.preferences

	' Retrieve the current AltFontFile value
	currAltFontFile = preferences.Files.AltFontFile
	MsgBox "The current value for AltFontFile is " & currAltFontFile, vbInformation, "AltFontFile Example"

	' Change the value for AltFontFile
	newAltFontFile = "C:/AutoCAD/Fonts/gothice.shx"
	preferences.Files.AltFontFile = newAltFontFile
	MsgBox "The new value for AltFontFile is " & newAltFontFile, vbInformation, "AltFontFile Example"

	' Reset AltFontFile to its original value
	preferences.Files.AltFontFile = currAltFontFile
	MsgBox "The AltFontFile value is reset to " & currAltFontFile, vbInformation, "AltFontFile Example"

 End Sub