全局钩子事件取消 [英] Global hook event canceling

问题描述

您好！我想知道如果我有两个不同的应用程序，其中全局挂钩监听相同的事件（让我们说是按键）会发生什么，并且他们都被编程为取消事件然后显示消息？



两者都会显示消息还是只显示一条消息？如果是这样的话为什么？



P.S.我会自己做这个实验，但我不能，因为我的好奇心在杀我，我想在这里问。

Hello! I was wondering what would happen if I had two different applications with global hooks "listening" for the same events(let's say for a key press) and both of them were programmed to cancel the event and then show a message?

Would both of the show the message or only one? If so why?

P.S. I would do this experiment myself but i can't and since my curiosity is killing me I thought to ask here.

推荐答案

来自MSDN [ ^ ]：

From MSDN[^]:

钩子程序可以采取的操作取决于所涉及的钩子类型。某些类型的钩子的钩子程序只能监视消息;其他人可以修改消息或通过链停止他们的进度，防止他们到达下一个钩子程序或目标窗口。

The action a hook procedure can take depends on the type of hook involved. The hook procedures for some types of hooks can only monitor messages; others can modify messages or stop their progress through the chain, preventing them from reaching the next hook procedure or the destination window.

因此，我想（就像你，我还没有测试过）只有拦截事件的第一个钩子程序会显示信息。

Hence, I suppose (like you, I have not tested it) that only the first hook procedure intercepting the event would show the message.

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