...
	boost::regex xRegEx("value='([0-9]{1,90})'"); //регулярка
	boost::smatch xResults;
	std::string::const_iterator xItStart = xStr.begin();
	std::string::const_iterator xItEnd = xStr.end();

	if( boost::regex_search(xItStart,xItEnd, xResults, xRegEx) ){
	
		std::cout << "value: " << xResults[1]<< std::endl << xStr << std::endl;
	} 
	else std::cout<<"no result"<<std::endl;
...