>This sounds like a hardware problem.
>
>Tore,
>
>Hmmm... you know what? It works on a full keyboard.
>
>But since my app only accepts numeric response.. the client got a USB numeric keypad to minimize space requirements.
>
>Could it be that NUMLOCK() does not apply or work on USB numeric keypads?
>
>Dennis

That could very well be. AFAIK many wireless keyboards only send data to the computer, they receive nothing back.