I have programme which performs calcs, re-dims huge arrays and draws the resulting graphs.

While it's doing this the computer just looks like it has crashed. To stop my users messing with the computer while it is doing it's job, I would like to give them a spinning mouse cursor or moving graphic so they know everything with the programme is OK, and the computer hasn't crashed.

Can anyone point me in the right direction? The graphic would have to be kept "on-top" as any message box I have shown in the past gets hidden behind whichever graph window is given focus while re-drawing.

Thanks