程序实现的是一个在局域网中运行的带有点对点传输文件功能的聊天室。在对话框中有一个树形控件，可以看到在该聊天室中的成员，要进行文件传输时只需点中对方，并按下文件传输按钮即可传输文件，而且文件的传输用到多线程，因此传输文件时可以正常聊天-Program is a local area network running in a peer-to-peer file transfer function in the chat room. In the dialog box there is a tree control, you can see in the chat room members, it is necessary to carry out file transfer when the only point in the other, and press the File Transfer button to transfer files, and file transfer using multi- thread, so you can transfer files to normal chat