# File lib/highline/system_extensions.rb, line 131
      def terminal_size
        format        = 'SSSSSssssSS'
        buf           = ([0] * format.size).pack(format)
        stdout_handle = WinAPI.GetStdHandle(0xFFFFFFF5)

        WinAPI.GetConsoleScreenBufferInfo(stdout_handle, buf)
        _, _, _, _, _,
        left, top, right, bottom, _, _ = buf.unpack(format)
        return right - left + 1, bottom - top + 1
      end