Hi there, I'm trying to use boost regular expression for the first time and I'm having some trouble getting it right. Current I'm trying to find all files with the a certain extension (by also using boost::filesystem), which should be simple, but I'm probably missing something. Here is the expression I'm using. boost::regex regularExpression; std::string expression("\.\/\w+(\.txt)"); try { regularExpression.assign(expression, boost::regex_constants::icase); ... std::string testAgainst((*iterPath).string()); if (boost::regex_match(testAgainst, regularExpression)) ... which (I thought) should match all string with the pattern "./filename.txt" but it does not. Using "\.\/\ReadMe(\.txt)" for example, correctly matches the ./ReadMe.txt file, so the \w+ seems not do what I'm reading from [1] where (\w+\.) is used to match part of a URL. Anyone can shine some light on this, or point me to another good reading about regular expression with boost? Note: I'm using version 1.34.1 because I have to. Thanks, S. [1] http://onlamp.com/pub/a/onlamp/2006/04/06/boostregex.html