I think the type of your m_strFirstName, m_strFullName, m_strLastName etc is char*.what ever it is change it to CString since your application supports MFC.
also change the code
m_strFullName = strTitle +" "+m_strFirstName +" "+m_strLastName;
to
m_strFullName = strTitle +_T(" ")+m_strFirstName +_T(" ")+m_strLastName;