问题描述
是否可以从 windows(xp 和 7) 服务编写全局键盘挂钩?(使用 SetWindowsHookEx 在系统服务中不起作用)
Is it possible to write a global Keyboard Hook from windows(xp and 7) service ? ( using SetWindowsHookEx didn't work from a system service )
推荐答案
SetWindowsHookEx 的文档说:
或与调用线程在同一桌面上的所有线程.
or with all threads in the same desktop as the calling thread.
所以你需要与同一个桌面关联(即使不考虑终端服务也会有多个桌面:普通桌面、安全桌面(用于 UAC 和登录)和屏幕保护程序).
So you need to be associated with the same desktop (and there will be multiple desktops even without considering terminal services: the normal desktop, the secure desktop (used for UAC and login) and the screen saver).
由于服务不与交互式会话相关联(并且，从 Windows V6 开始，不能)，您需要用户会话中的一个进程来执行挂钩，并与后端服务通信(例如，通过命名管道).并且不要忘记在没有人登录和多个用户登录的情况下进行测试.
Since services are not associated with an interactive session (and, from Windows V6, cannot be) you'll need a process within the user's session to do the hooking, and communicate with the backend service (eg. via a named pipe). And don't forget to test with no-one logged in, and multiple users logged in.
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