井字游戏，一个益智类小游戏，主要利用鼠标消息来实现，它响应3种类型的客户区鼠标事件：单击左键，单击右键以及双击左键-Tic Tac Toe game, a puzzle game, the main message to the use of the mouse, it responds to three types of client area mouse events: click the left button, right-click and double-click the left