Evaluates a formula or expression that is in the form of text and returns the result
static int Evaluate( CXlOper& xloValue, LPCTSTR formula_text );
A reference to a CXlOper that will contain the desired data if the function succeeds.
Formula_text is the expression in the form of text that you want to evaluate.
Zero if the function has been called successfully; non-zero if the function could not be called. See Error codes for a list of return values.
See the Microsoft Excel on-line Help for full details about this function.