code: public String getMessage() {
          String message = super.getMessage();
          if (m_iErrorCode != -1)
              message = message + " Error code: " + m_iErrorCode;
          return message;
      }
docs: Returns the detail message string of this throwable.
  
  @return  the detail message string of this <tt>Throwable</tt> instance
  (which may be <tt>null</tt>).