https://blog.wongcw.com/2020/06/11/progressbar95%ef%bc%9a%e8%ae%93%e4%bd%a0%e6%87%b7%e8%88%8a%e7%b6%93%e5%85%b8windows%e7%9a%84%e5%b0%8f%e9%81%8a%e6%88%b2/