在程序开发过程中，经常遇到需要保护用户信息和私有数据不被他人窃取的情况，也就是要对数据进行加密。

在Win2000以前，要对数据进行加密和解密操作，一般要使用CryptAPI函数，相当烦琐。幸运的是，从Win2000

开始，操作系统从内核的级别上提供了对文件进行加密和解密的函数，而且使用起来相当简单。

-In the program development process, often encounter the need to protect user information and private data from being stolen by others, the situation, that is to encrypt the data. In Win2000 before, to the data encryption and decryption operations, generally use CryptAPI function, quite cumbersome. Fortunately, starting from the Win2000 operating system from the kernel level provides file encryption and decryption functions, but also fairly simple to use.