说明：  一个比较基本的点对点聊天程序，局域网范围内的聊天程序，适合同事之间互相交流，输入对方IP地址和用户名就可以发送消息了，只要对方正在打开本软件，就能收到消息，本程序除了发消息之外没有其它的功能，比较简单的。
(A more basic point-chat program, local area network within the chat program, suitable for exchange among colleagues, enter each other' s IP address and user name, you can send messages, and as long as the other side is opening this software, you can receive the message, This process, in addition no other function than send an announcement relatively simple.)