此代码为socket通信程序，主要是从客户端发送一文件，然后在在服务器段接收。

利用udp来传输文件，socket发送（接受）程序。

套接字发送与接收图片文件，并将接收到的图片文件显示到对话框主界面。截取对方屏幕，再发送过来-A socket send and receive pictures of files, and will receive the image files to indicate to the interface dialog box. Intercept each other screen, then send to come over

基于SOCKET技术聊天室设计,就像OICQ一样,可以实现文件传递与发送(Chat room design, based on SOCKET technology like OICQ, can realize the file transfer and send)