用过共享软件的人都知道，一般的共享软件(特别是国外的)在使用一段时间后都会提出一些“苛刻”的要求，如让您输入注册号等等。如果您想在软件中实现该“功能”的话，方法有很多。在这里我介绍一种我认为安全性比较高的一种，仅供参考。

大家都知道，当您在命令行中键入“dir”指令后，系统都会读出一个称作serial number的十六进制数字。这个数字理论上有上亿种可能，而且很难同时找到两个序列号一样的硬盘。这就是我这种注册方法的理论依据，通过判断指定磁盘的序列号决定该机器的注册号。

-Used to share software know that, generally sharing software (especially abroad) will be used for some time to make some "harsh" requirements, such as allowing you to enter registration number and so on. If you want to achieve in the software of the "function", then there are many ways. Here I introduce a I think a higher security for reference purposes only.

We all know that when you type in the command line "dir" command, the system will read out a known serial number of hexadecimal digits. The number of millions of theoretical possible, but it is very difficult to find two the same hard drive serial number. This is my way of theoretical basis of this registration, specify the disk through the judge decided that the machine serial number, registration number.