https://blog.wongcw.com/2020/08/09/windowswap%ef%bc%9a%e7%96%ab%e6%83%85%e4%b9%8b%e4%b8%8b%e7%9a%84%e4%b8%96%e7%95%8c%e4%b9%8b%e7%aa%97/