说明：  包含IO完成端口的讲解文档和源码实现，其实现对IO完成端口进行了封装，可直接拿来用。作为测试，还做了客户端。
(This article presents a class which can be used in both the client and server code. The class uses IOCP (Input Output Completion Ports) and asynchronous (non-blocking) function calls which are explained later. The source code is based on many other source codes and articles. With this simple source code, you can: Service or connect to multiple clients and servers. Send or receive files asynchronously. Create and manage a logical worker thread pool to process heavier client/server requests or computations.)