 return a container that contains a 
         sequence of all the captures obtained during the regular expression 
         matching.&nbsp; The following example program shows how this information may be 
         used:</P>
      <PRE>#include &lt;boost/regex.hpp&gt;
#include &lt;iostream&gt;


void print_captures(const std::string&amp; regx, const std::string&amp; text)
{
   boost::regex e(regx);
   boost::smatch what;
   std::cout &lt;&lt; "Expression:  \"" &lt;&lt; regx &lt;&lt; "\"\n";
   std::cout &lt;