Hello All, I'm probably missing something obivous here.....So please fogive me if it's a basic error. I am using regex for the first time on MSVC 6 and would like to create a simple function that could pass in a string and an expression to do a regular match on it. I believe I have successfully compiled this library, but I don't understand why either of these simple functions are not working.... bool TestStr (std::string& szExpr, const std::string& szSearch) { bool bResult=false; boost::regex cExpr(szExpr); bResult = boost::regex_match(szSearch, cExpr); return bResult; } or bool TestStr2 (std::string& szExpr, std::string& szSearch) { return boost::regex_match(szSearch, boost::regex(szExpr)); } After debugging these routines, it appears thta the boost::regex declaration fails (at least for the first function) returning a Kernel32.dll exception with some kind of address. The credit card example implies that the search and the regex example I have observed keeps the regex expressions as constansts inside the function, but I would like to be able to parse in my own string Questions? 1. Wht doesn't any of the functions work? 2. Is there a tutorial outside of the regex library I could look at. 3. I would be interested to know if anyone had any POSIX regex examples.... Many thanks in advance, Richard