How to do local hook to notepad in C++?

See more:

C++

hooking

Hi everyone,
I try to do local hook to writing window on NotePad, my code is:

#include <windows.h>

HHOOK keyboardHook;

LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (wParam == WM_KEYDOWN && nCode == HC_ACTION)
    {
        Beep(440, 440);
        return 0;
    }
    return CallNextHookEx(keyboardHook, nCode, wParam, lParam);
}

int main()
{
    HWND hParent = FindWindow(L"Notepad", L"Untitled - Notepad");
    HWND hChild = FindWindowEx(hParent, NULL, L"Edit", L"");
    DWORD processId;
    DWORD threadId = GetWindowThreadProcessId(hChild, &processId);

    keyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardProc, 0, threadId); // Why not work???

    MSG msg{ 0 };
    while (GetMessage(&msg, NULL, 0, 0) != 0);

    UnhookWindowsHookEx(keyboardHook);

    return 0;
}

"Global hook" works well when I put the last parameter of SetWindowsHookEx function is zero. But local hook with this parameter threadId (not equal to zero) is not working ! I don't know why is that ! Help me, please. Thanks.

What I have tried:

I tried to find this problem from internet, but there is no !