随着Internet的迅速流行，越来越多的应用程序需要具备在网上与其它程序通信的能力，Windows应用程序可以有无限的网络功能，所有这些都建立在WinSock接口的基础上。

在网上通信的应用程序，无论是通过因特网还是通过小型办公网都采用同样的原则，通过类似的功能实现网络通信。一台计算机中的一个应用程序等待另一个应用程序打开网络连接，执行通信，这个应用程序“监听”其它应用程序的连接请求，就像你守在电话机旁等待电话一样。

同时，另一个应用程序（一般在另一台计算机上），试图与“监听”应用程序连接。这种打开连接的做法与打电话给别人一样。你拨电话时希望对方在线路的那一头等你，打电话时必须知道对方的电话号码。如果不知道，可以查电话本。类似地，应用程序要建立连接也必须知道对方的网络地址。

在两个应用程序间建立连接后就可以发送消息，正像你在电话中与对方交谈一样。-With the rapid popularity of the Internet, more and more applications need to have the ability to communicate online with other programs, Windows applications can have unlimited networking features, all of which have been established on the basis of the WinSock interface.

In online communication applications, whether it is to apply the same principle through the Internet or through a small office network, network traffic through a similar function. An application in a computer waiting for another application to open the network connection, the implementation of communication, the application to "listen" other application s connection request, as you keep by the phone waiting for the phone.

The same time, another application (usually in another computer), trying to "listen" to the application connection. The open connection is to call others. When you dial the telephone to each other in line in that first class, when the call must know each other s phone numbers. If you do not know, y