I'm mildly jealous, I have to resort to excel solver or clunky VBA macros these days.
Hi The VBA programing language may not be in the same league as a proper compiled language like C or Pascal but it can be very helpful when handling large CSV files. I have a VBA script that imports a navigation CSV file from a GPS in BNG format, converts to WGS84 Lat and Lon before using the OSGB15 conversion to deliver a much more accurate BNG location on a map.