Thanks for the code Michi - fab stuff! I understood most of it - I've only just got into using the Winsock controller for my gauge project.

The F4Lib module and SimData class I will need to see working to better get my head around...

Sometime after Christmas, I think I will order the Master card from OpenCockpits and give this a go. Do you know if the Master card has the same "3 switches on" limit as Leo Bodnars USB controller please?

Cheers