WH_KEYBOARD_LL hook not called

Question

I\'m having some problems with a WH_KEYBOARD_LL hook :

The reason why I\'m using a global LL hook is not important I just need it for my app (I tried other

Answer 1

The hook callback is made on the same thread that called SetWindowsHookEx(). That bit of magic requires that thread to pump a message loop. Which is the rub, your timer callback method is called from a threadpool thread. It doesn't pump, it's not even around long enough to ever be able to get the hook callback.

Invoke to your UI thread or use a synchronous timer. Or consider just temporarily disabling whatever you do in the hook callback instead of completely disabling or replacing the hook, that certainly makes most sense.