Delphi component for calculating expressions, entered in Run-Time. For Delphi4, 5, 6, 7 and higher. Delivered with sources. The expressions can contain numbers, arithmetic ('+', '-', '*', '/') and logic ('=', '>', '', '>=', '<=', 'AND', 'OR') operators and functions, defined by user (FDU). A maximal length of the expression corresponds to the length of the Delphi data type AnsiString.