I've just read that he wants to refresh the graph only once a minute or less often, so speed doesn't really seem to be an issue.

CU,
Armin


>>Hmmm ... doing that with Excel might be too slow when having to display incoming data in realtime. Just a thought.
>
>Yes, that is quite possible. I don't know the alternatives, but perhaps the ActiveX controls suggested will work better.
>
>Hilmar.