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copied!<pre><code>hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, NULL, 0); </code></pre> <p>SetWindowsHookEx requires a hModule - save the hModule from DllMain and pass it here. (You can pass NULL only if the thread id is your own thread.)</p> <p>One exception to this is for the _LL hook types; these don't need a hmodule param since these hook don't inject into the target process - that's why your code using KEYBOARD_LL is 'succeeding'. </p> <p>As for why it might be blocking when you use KEYBOARD_LL - docs for LowLevelKeyboardHookProc mention that the thread that installs the hook (ie. calls SetWindowsHookEx) must have a message loop, which you might not have in your python code.</p> <p>Debugging tips: it looks like SetWindowsHookEx should be returning NULL (with GetLastError() returning a suitable error code); while developing code, using some combination of assert/printf/OutputDebugString as appropriate to check these return values is a good way to ensure that your assumptions are correct and give you some clues as to where things are going wrong.</p> <p>BTW, one other thing to watch for with KEYBOARD vs KEYBOARD_LL: the KEYBOARD hook gets loaded into the target process - but only if it's the same bitness - so a 32-bit hook only sees keys pressed by other 32-bit processes. OTOH, KEYBOARD_LL is called back in your own process, so you get to see all keys - and also don't need to deal with the shared segment (though as far as I know it's also less efficient as a KEYBOARD hook).</p>

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