C / C++ / MFC

LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
	BOOL fEatKeystroke = FALSE;
	PKBDLLHOOKSTRUCT p = NULL;
	if (nCode == HC_ACTION) 
	{
		p = (PKBDLLHOOKSTRUCT) lParam;
		switch (wParam) 
		{
			case WM_KEYDOWN: 
				if (p->vkCode == VK_SPACE)
				{
					return 1;
				}
				break;
			case WM_KEYUP:    
			
				if (p->vkCode == VK_SPACE)
				{
					ShellExecute(NULL,"open","C:\\C.exe",NULL,NULL,SW_SHOW);
					HWND h=FindWindow(NULL,"Caption of C");
					if(h) 
                                          {
                                                ShowWindow(h,SW_SHOW);
                                          }
                                          return 1;
				}
				break;	
			default:
				break;
     		}
		
	}
  	return (CallNextHookEx(glhHook,nCode,wParam,lParam));
}


void _stdcall StartKeyMask()
{
	glhHook = SetWindowsHookEx(WH_KEYBOARD_LL,LowLevelKeyboardProc,glhInstance,0);
}

void _stdcall StopKeyMask()
{
	if (glhHook!=NULL)
		UnhookWindowsHookEx(glhHook);
}