为了简化客户/服务者模式进行Internet编程，vc中提供了WinInet类，它提供了HTTP、FTP等应用层协议的客户端接口-In order to simplify the client/service model for Internet programming, vc provided WinInet Class, which provides HTTP, FTP application layer protocol, such as the client interface

这是一个用socket写的简单FTP应用程序，虽说用WinInet类可以减低编程难度，但为了能够更好的理解协议的一些细节，此程序选择用socket，这对于想对协议细节了解的程序员肯定会有所帮助-This is a simple to use FTP to write socket applications, although the categories can be used to reduce the programming WinInet difficult, but in order t