How do I get regex support in excel via a function, or custom function?

Question

It appears that regex (as in regular expressions) is not supported in excel, except via VBA. Is this so, and if it is, are there any \"open source\" custom VBA functions tha

Answer 1

--- FEB 2014 ---

Just to give an alternative, both Open Office and Libre Office Calc software (their spreadsheet software name) allow for regular expressions in their search functionality.