boost library parsing metacharacter and word

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MFC

hai,
how i can Separate meta characters and word using boost library.This my code

code:

boost::regex patternexpression("\\W+",boost::regex_constants::icase|boost::regex_constants::normal);
    std::string stringa ("Dear %1244,{Customerid:D}hfsduihui{Customerid:D}sd u");
    boost::sregex_token_iterator k(stringa.begin(), stringa.end(), patternexpression,0);
    boost::sregex_token_iterator l;

while(k != l)
    {
        std::string temp1 = *k;
        CString m_strConvertstring1(temp1.c_str());
        AfxMessageBox(m_strConvertstring1);
        k++;
    }

This code only split in word and how can split meta characters
Thanks for advance