class Reline::Windows

def self.move_cursor_down(val)
  if val > 0
    return unless csbi = get_console_screen_buffer_info
    screen_height = get_screen_size.first
    y = cursor_pos.y + val
    y = screen_height - 1 if y > (screen_height - 1)
    @@SetConsoleCursorPosition.call(@@hConsoleHandle, (cursor_pos.y + val) * 65536 + cursor_pos.x)
  elsif val < 0
    move_cursor_up(-val)
  end
end