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I'm making a program that needs to block all input during a short critical section. I used BlockInput, but it still allows the user to use hotkeys like Ctrl+Alt+F1 or Ctrl+Alt+F2 (switching taskbar in both displays). It is crucial that the user is not able to use these two hotkeys.

I read some things about a hook, but I'm not sure where to start with this solution. Any help would be greatly appreciated.

Thanks!

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A keyboard hook could do the trick - check out SetWindowsHookEx. Note that it gets tricky on 64-bit systems.

But may I suggest simply setting your process/thread priority to some ludicrously high value? Windows will really favor your process then, and at the highest settings even keyboard and mouse stopped working - I found that out the hard way. :)

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