一个简单电子白板示例，为了工程的简单性目前只支持两用户，它允许两个用户连接到对方，自身程序既可作服务方，也可作客户方，和另外一个运行的服务端或客户端连接。-his article is my attempt at developing an extremely simple whiteboard application to be used simultaneously by two users. Although I started my attempt with support for mo