Low level mouse hook - mouse freeze on breakpoint

Question

I would like to draw and move my windows by myself (using chromium embedded framework). To do this, i need a global callback when the mouse is being moved, outside of my window - so i installed a low level mouse hook:

hMouseLLHook = SetWindowsHookEx(WH_MOUSE_LL, (HOOKPROC)mouseHookProc, hInstance, NULL);

The hook simple grabs the mouse events and calls "CallNextHookEx". No problems here, everything works as excpected. My problem now: if the debugger breaks or an exception is being thrown, I can't move the mouse anymore..

I tried processing the hook in another thread, like so:

HANDLE mouseProcHandle = CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)mouseProcessor, NULL, NULL, &dwMouseProcThread);

DWORD WINAPI Win32Application::mouseProcessor(LPVOID lpParm) {
    hMouseLLHook = SetWindowsHookEx(WH_MOUSE_LL, (HOOKPROC)mouseHookProc, ((Win32Application*)Application::getInstance())->hInstance, NULL);

    MSG message;
    while (GetMessage(&message, NULL, 0, 0)) {
        TranslateMessage(&message);
        DispatchMessage(&message);
    }

    UnhookWindowsHookEx(hMouseLLHook);
    return 0;
}

But this also does not solve the problem. Is there a workaround, solution or another method to do this? Also, I think a low level hook may not be necessary, as I only need to be informed about the moevement and it wouldn't be a problem if I would be the last one in line, so the system/other processes can process the mouse callbacks first.

Answer 1

As your debugger stop the whole program (all threads of it)
there is probably no workaround if using the hook.
Not as accurate, but you could poll GetCursorPos in a thread instead.