How to block keys on the keyboard using following source code?

[rafa]

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 to know that keys are not locked?


Source :

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.

Sorry for my language , I'm from Argentina.

[Banfa]

You do realise that you will need to run an application that uses this DLL before any effects from it would take effect?