Archer30, there is no fast way to check A + click. You have to call GetKeyState manually on mouse event, like Era Erm Framework does for system keys. However some soft like Comodo Firewall treats multiple key checks as keylogging attempts and may block some attempts. Really, if you check each key state each millisecond, it's a keylogger.
I will have to add OnKeyReleased, probably, to be able to keep currently pressed key globally.