Hi, I'm using the Regex library for the first time with Visual Studio 2008. I've created a simple win32 console project, which works fine. The code is ------------------------------------- const char *pattern = "^(\\w*)\\s*=\\s*(\\w*).*"; const char *text = "Key = Value; Comment"; boost::regex re(pattern); boost::cmatch match; std::cout << pattern << std::endl; std::cout << text << std::endl; if (regex_match(text, match, re)) { std::cout << "--> " << match.size() << std::endl; for (int i = 0; i < match.size(); ++i) { std::cout << i << ": " << match[i] << std::endl; } } ------------------------------------- And the output is as expected: -------------------------------------- ^(\w*)\s*=\s*(\w*).* Key = Value; Comment --> 3 0: Key = Value; Comment 1: Key 2: Value -------------------------------------- However, I've tried to use the same code with the C/C++-API of a commercial software, and here I get the following output: -------------------------------------- ^(\w*)\s*=\s*(\w*).* Key = Value; Comment --> 3 - 0: Key = Value; Comment - 1: Key = Value; Comment - 2: Value; Comment -------------------------------------- Does anybody have an idea what's wrong here? Unfortunately, I'm not allowed to post any header files, so I need some hints where to look for a solution by myself. Thanks for any help! Regards Carsten Witzel