全局钩子的一个例子，能截获CBT_Active消息，对该窗口的标题进行修改，对了解钩子有很好的作用,An example of the global hook that can intercept CBT_Active message, the title of the window changes to the understanding of the role of good hook

hook 示例，截获系统消息，根据自己的情况处理-hook example, the interception system message, according to their own situation handling