如果你不想使用线程，而此时你的程序又进入了死循环，但是你又想与界面实时通信，最好的办法就是在while里加入消息循环，在监控工程中此法特别有用。-this demo show you how to work about the message loop,it is very useful for operating the GUI when your program come into the while loop.

父进程创建子进程，通过创建管道实现父进程与字进程之间的实时通信。-Parent process creates the child process, parent process by creating a pipe with the word achieve real-time communication between processes.