enum FormulaFunction { None = 0, Sin = 1, Cos = 2, Tan = 3, Asin = 4, Acos = 5, Atan = 6, Exp = 7, Log = 8, Sqrt = 9, If = 10, Or = 11, And = 12, Not = 13, Abs = 14, TextFileLookup = 15, PI = 16, ConduitSizeLookup = 17, Round = 18, RoundUp = 19, RoundDown = 20, SizeLookup = 21, Ln = 22 };