How to remap alt with control in c++?

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So i try to remap LALT to LCTRL and use function like "keybd_event" and "SendMessageA" but didn't get nothing.

LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode == HC_ACTION)
    {
        KBDLLHOOKSTRUCT* p = (KBDLLHOOKSTRUCT*) lParam;
        if (p->vkCode == VK_LMENU)
        {
            keybd_event(VK_CONTROL, 0, 0, 0);
            // or use this is sameSendMessageA(0, WM_KEYUP, VK_CONTROL, 0);
        }   
    }
    return CallNextHookEx(hHook, nCode, wParam, lParam);
}

How to remap LALT to LCTRL? Can you give me some idea to solve that?

Posted 21-Aug-13 11:37am

novadivlja

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Comments

chaau 21-Aug-13 20:46pm

I think you need to use SetKeyboardState http://msdn.microsoft.com/en-us/library/windows/desktop/ms646314(v=vs.85).aspx

novadivlja 23-Aug-13 5:58am

Can you be more specific, what to do with SetKeyboardState, where to put it, what will get if i put those function in code? ... i need idea for solving problem.

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MuthukaruppanP · Accepted Answer · 2013-08-27T09:21:00

LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode == HC_ACTION)
    {
        KBDLLHOOKSTRUCT* p = (KBDLLHOOKSTRUCT*) lParam;
        if (p->vkCode == VK_LMENU)
        {
            if (wParam == WM_KEYDOWN)
 
                keybd_event(VK_LCONTROL, 0x1D, KEYEVENTF_EXTENDEDKEY | 0, 0 );
 
            else if (wParam == WM_KEYUP)
 
                keybd_event( VK_LCONTROL, 0x1D, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
 

            return 1;
        }
    }
    return CallNextHookEx(hHook, nCode, wParam, lParam);
}

These lines will solve your problem if you press LALT then it will act as LCTRL i.e. LCTRL key will be depressed and if you release LALT, LCTRL will be released.