Source key lock, F2,F3,F1

rafa007 (1)
Good the other day I passed this source that supposedly serves to lock the keys on the keyboard ( in this case only blocks F1) .

The problem is that it does not work , I got tired of trying different configurations (from google ) but nothing , it is business as simepre .

Someone could help me and tell me where is the error of sorce that locks the keys?

Thank you very much .-

Source :

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HHOOK g_hHookKbdLL = NULL;
LRESULT CALLBACK KeyHookLL(int nCode, WPARAM wp, LPARAM lp);

BOOL APIENTRY DllMain(HINSTANCE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{


switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
g_hHookKbdLL = SetWindowsHookEx(WH_KEYBOARD_LL,KeyHookLL, hModule, 0);
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
case DLL_PROCESS_DETACH:
UnhookWindowsHookEx(g_hHookKbdLL);
g_hHookKbdLL = NULL;
break;
}
return TRUE;
}


LRESULT CALLBACK KeyHookLL(int nCode, WPARAM wp, LPARAM lp)
{
KBDLLHOOKSTRUCT *pkh = (KBDLLHOOKSTRUCT *) lp;

if (nCode==HC_ACTION)
{
if(pkh->vkCode==VK_F1) // Bloquear F1
{
return 1;
}
}
return CallNextHookEx(g_hHookKbdLL, nCode, wp, lp);
}


PD : supposedly to block only needs to be changed : if ( PKH - > vkCode == VK_F1 ) / / Block F1 x if ( PKH - > vkCode == VK_F2 ) / / Block F2 and so on.
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