该代码功能是支持自动把一个源文件夹的内容同步备份到目标文件夹。程序具有实时监控目标文件夹的功能，可以指定两种方式备份，一种是按时备份，一种是当源文件夹发生改变时进行快速备份，有点类似杀毒软件的监控功能。-The code function is to support a source folder automatically synchronize the contents of the backup to the destination folder. Program with real-time monitoring function of the target folder, you can specify the backup in two ways, one is the backup time, one is when the source folder changed quickly when a backup is somewhat similar to the anti-virus software monitoring capabilities.