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Hi everyone,

I need to lock keyboard for my project. How can I do this? It's need to work all Windows systems(Win 7 and Win8 for start)..

I'm waiting for answer. Thanks for answers. Have a good day..
Posted
Updated 14-Jun-15 2:57am
Comments
LLLLGGGG 14-Jun-15 9:16am
   
There are a lot of solution on the intermet. Have you checked them? What have you tried so far?
Umut Comlekcioglu 14-Jun-15 10:11am
   
Yes I'm check too many solution but I can't found what I want. Finally I found that one,

LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
if (nCode == HC_ACTION)
{
KBDLLHOOKSTRUCT* p = (KBDLLHOOKSTRUCT*) lParam;
if (p->vkCode == VK_LMENU) // VK_LMENU = ALT key
{
switch (wParam){

case WM_SYSKEYDOWN :{ // use SYSKEYDOWN
cout << "Key down" << endl;

keybd_event(VK_LCONTROL, 0x1D, KEYEVENTF_EXTENDEDKEY | 0, 0 );
break;
}
case WM_KEYUP: // use regular keyup
{
cout << "Key up" << endl;

keybd_event( VK_LCONTROL, 0x1D, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
return 1;

break;
}
default:
wParam = WM_SYSKEYDOWN; // if you do not specify it changes back to alt
break;
}
return 1;
}
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}

but I want to ask them too.
LLLLGGGG 14-Jun-15 12:18pm
   
If it works add it as a solution in order to make other developers understand that the question is closed.
Afzaal Ahmad Zeeshan 14-Jun-15 10:31am
   
Just do not handle the input at all.

1 solution

C++
LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
if (nCode == HC_ACTION)
{
KBDLLHOOKSTRUCT* p = (KBDLLHOOKSTRUCT*) lParam;
if (p->vkCode == VK_LMENU) // VK_LMENU = ALT key
{
switch (wParam){

case WM_SYSKEYDOWN :{ // use SYSKEYDOWN
cout << "Key down" << endl;

keybd_event(VK_LCONTROL, 0x1D, KEYEVENTF_EXTENDEDKEY | 0, 0 );
break;
}
case WM_KEYUP: // use regular keyup
{
cout << "Key up" << endl;

keybd_event( VK_LCONTROL, 0x1D, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
return 1;

break;
}
default:
wParam = WM_SYSKEYDOWN; // if you do not specify it changes back to alt
break;
}
return 1;
}
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}


It's work for handle key input. Everyone can use this..
   

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