介绍在VB环境下如何使用Winsock控件实现局域网通信。程序员无须了解TCP或低级Winsock APIs 调用实现的细节，只需通过设置控件的属性并调用其方法就可轻易连接到一台远程计算机中，并且实现双向交换数据。-This paper introduces how to realize LAN communication using Winsock controls under VB. The programme must not understand TCP or low grade Winsock APIs calling function, and connect the distant computer easily by setting the controls and calling methods. The data exchange can implemented in bidirection.