# File lib/highline/system_extensions.rb, line 38
      def terminal_size
        m_GetStdHandle               = Win32API.new( 'kernel32',
                                                     'GetStdHandle',
                                                     ['L'],
                                                     'L' )
        m_GetConsoleScreenBufferInfo = Win32API.new(
          'kernel32', 'GetConsoleScreenBufferInfo', ['L', 'P'], 'L'
        )

        format        = 'SSSSSssssSS'
        buf           = ([0] * format.size).pack(format)
        stdout_handle = m_GetStdHandle.call(0xFFFFFFF5)
        
        m_GetConsoleScreenBufferInfo.call(stdout_handle, buf)
        bufx, bufy, curx, cury, wattr,
        left, top, right, bottom, maxx, maxy = buf.unpack(format)
        return right - left + 1, bottom - top + 1
      end