Disable hotkey "ctrl + alt + tab"

Question

I tried to disable the hotkey "ctrl + alt + tab" with a LL keyboard hook,but looks like this key combination cannot be intercepted by LL keyboard hook. Is there any way I can disable it with registry ?

Answer 1

Hi, @Ash13

The hook works for me:

#include <iostream>
#include <Windows.h>

HHOOK hookHandle;

LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {
    if (nCode == HC_ACTION) {
        KBDLLHOOKSTRUCT* kbStruct = reinterpret_cast<KBDLLHOOKSTRUCT*>(lParam);
        if (wParam == WM_KEYDOWN && kbStruct->vkCode == VK_TAB &&
            GetAsyncKeyState(VK_CONTROL) & 0x8000 && GetAsyncKeyState(VK_MENU) & 0x8000) {
            
            std::cout << "Ctrl+Alt+Tab combination intercepted!" << std::endl;
            return 1; 
        }
    }
    return CallNextHookEx(hookHandle, nCode, wParam, lParam);
}

int main() {
  
    hookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardProc, NULL, 0);
    if (hookHandle == NULL) {
        std::cerr << "Failed to install keyboard hook" << std::endl;
        return 1;
    }

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

    UnhookWindowsHookEx(hookHandle);

    return 0;
}

Best regards,

Minxin Yu

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