用C＋＋实现文件夹同步

Using C＋＋ To Achieve Folder Synchronizing

所谓的文件夹同步，也叫实时备份，就是保持目标文件夹中的文件随时和源文件中的文件完全一致。要实现同步，程序就必须随时知道源文件夹中的文件是否发生了变化。那么该功能是如何实现的呢？本文给出了实现的方法（API函数）和原理，同时用一个C＋＋Builder中的实例来证明问题。

Folder synchronizing in other words is real-dine backup, It is a procedure to ensure that the files within the target folder are identical to the files within the original folder at all times. In order to achieve folder synchronizing, it is necessary to monitor any changes made to the original files, How is the procedure made practical？ This document will introduce the solution （API function） and demonstrate the method with several real life examples using the soft C＋＋ Builder.