A boolean expression parser, complete search engine like support for and, or, not, brackets, "", etc

Ever wanted the ability to run a 'smart' search, ie, with full and's, or's, not's, xor's, brackets (even nested brackets), and "". Basically like a search engine? This is the vb code to do it for you. An example expression would be: animals and ((cats or feline) or (dogs or canine)) and "is cuddly" Very usefull and very easy to implement