Thread: disabling system keys in a windows console

Does anybody know anything about this?

I'm on Win98 SE using gcc and I need to know if there's a way to disable alt+space while my program is running. It can't be done by using PIF / program property files. For one, this is disabled for me, for two it's just better that way as when you do it with code it ensures it will work. The program is doing it and it's not dependant on a file.

You need to setup a Windows low-level keyboard hook and capture the keypresses there. Here is example code:

Code:

LRESULT CALLBACK LowLeveKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if(nCode == HC_ACTION)
    {
    	int eatKeyPress = 0;
    	
        switch(wParam)
        {
        case WM_KEYDOWN:
        case WM_KEYUP:
        case WM_SYSKEYDOWN:
        case WM_SYSKEYUP:
            {
                PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT)lParam;

                // capture alt space
                if(p->vkCode == VK_SPACE && (p->flags & LLKHF_ALTDOWN))
                {
                   eatKeyPress = 1;
                }
                break;
            }
        }
    }

    return(eatKeyPress ? 1 : CallNextHookEx(NULL, nCode, wParam, lParam));
}

int main(void)
{
	SetWindowsHookEx(WH_KEYBOARD_LL, LowLevelKeyboardProc, GetModuleHandle(0), NULL);
	printf("While this app is running, alt+space is disabled");
	char c = getchar();
	return(1);
}

i havent' compiled it, but it should give you an idea of the kind of thing you need to do... if it doesn't work, play and fiddle with it til it does!

good luck
U.

Can you refer me to a Windows Hooks tutorial, web page, document or the like?
Possibly where you learned how to use them.

I have searched for it, and this is a problem that's been bugging me for a few months.

Look at MSDN... search for HOOK tutorials and articles in there.

BTW, manners will help you get help in the future!