Thanks Barry,I will go and check out the lines of code using Notepad as you suggest. Do you or anyone else know of a math formula for converting inches of mercury to millibars? I have been asked to try and do this for a fellow simmer. The gauge in question is the Baron altimeter.

Sure,1 mb equals 0.0295299 inHgor 1 inHg is equivalent to 33.86388 mbartherefore, in a standard atmosphere, 29.92 inHg equal 1013.2 mbCheers,Martin