Hi, im having trouble with a base case for regex_search and the number of hits it finds in a haystack. I am wondering if i am not setting flags that need to be set, but i cannot find anything for this in the docs. My usage only seems to find the string "HELLO" once, as the cout indicates xcmMatch.size() is 1 after i run this. I am using boost libs 1.31.00 . Thanks! Heres my code: string sMatchMe = "HELLO"; int theseflags=0; boost::regex xreMatchme(sMatchMe.c_str(), theseflags); boost::cmatch xcmMatch; string stupid = "sdfaHELLOdsfh*sadhfas1d3ahsdf%as&d!adfasdfsdHELLObnbc"; if(regex_search(stupid.c_str(), xcmMatch, xreMatchme)) { cout << "number of matches here should be " << xcmMatch.size() << endl; }