"If you use the objects that are available in the Microsoft VBScript Regular Expressions 5.5 library, you can compare a string against a specific pattern, replace a string pattern with another string, or retrieve only portions of a formatted string. This article describes how to construct a pattern to parse a string that contains multiple instances of the same pattern...":

http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B818802