[Duvida] Script para deixar tela FullScreen

#==============================================================================
# ** Window_Options
#------------------------------------------------------------------------------
# By Valentine
#==============================================================================

class Window_Options < Window_Base
  #--------------------------------------------------------------------------
  # * Inicialização dos Objetos
  #--------------------------------------------------------------------------
  def initialize
    super(235, 165, 170,128)
    $game_temp.windows << self
    self.contents = Bitmap.new(width - 32, height - 32)
    self.back_opacity = 200
    self.visible = false
    self.active = false
    self.z = 9999999
    @selection_button = Button.new(self, 17, 23, Vocab::OPTIONS_SELECTION) {$game_temp.to_title = true}
    @login_button = Button.new(self, 17, 45, Vocab::OPTIONS_LOGIN) {$game_temp.to_login = true}
    @leave_button = Button.new(self, 17, 67, Vocab::OPTIONS_EXIT) {Network.close_socket; exit} 
    @fullscreen_button = Button.new(self, 22, 90, Vocab::OPTIONS_FULLSCREEN)
    if Config::FULL_SCREEN == "true"
      Config::FULL_SCREEN == "false"
    else
      Config::FULL_SCREEN == "true"
    end
    @title = Sprite_Title.new(self, Vocab::TITLE17)
    @dragable = true
    @closable = true
  end
  #--------------------------------------------------------------------------
  # * Sair do Jogo
  #--------------------------------------------------------------------------
  def leave_game
    # Este def também é chamado no SDK
    $mouse.clear_target
    $game_temp.chat_text = []
    $game_temp.chat_color = []
    #$game_party.close
    $game_drops.remove_all
    Game_Netplay.closewindows
    Game_Netplay.autosave
    Network.clear_player(1)
    # Apagar jogadores
    Network.clear_players
    Network.load_account(Network.name)
    $mouse.clear_icon
    $mouse.reset
  end
  #--------------------------------------------------------------------------
  # * Atualização do Frame
  #--------------------------------------------------------------------------
  def update
    super
    @title.update
    if Config::ATTACK == "Mouse"
      if !@checkboxA.checked and !@checkboxB.checked and $game_temp.follow == 1
        @checkboxA.value = true
      elsif !@checkboxA.checked and !@checkboxB.checked and $game_temp.follow == 0
        @checkboxB.value = true
      elsif @checkboxA.checked and $game_temp.follow == 0
        $game_temp.follow = 1
        @checkboxB.value = false
      elsif @checkboxB.checked and $game_temp.follow == 1
        $game_temp.follow = 0
        @checkboxA.value = false
      end
    end
  end
end