本程序通过使用网际控制报文协议ICMP的回送和回送响应消息来发现网络活动主机。-procedures through the use of the Internet Control Message agreement sent back to the ICMP and to send in response to the news to find networking activities mainframe.

查看当前局域网拓扑状况，通过MFC实现。-Get current LAN topology state, made by MFC.

工作者线程：使用工作者线程查找局域网内在线用户-Worker threads: use worker threads Find online users within the LAN