def get_ntstatus_code(self):
        """
        @rtype:  int
        @return: NTSTATUS status code that caused the exception.

        @note: This method is only meaningful for in-page memory error
            exceptions.

        @raise NotImplementedError: Not an in-page memory error.
        """
        if self.get_exception_code() != win32.EXCEPTION_IN_PAGE_ERROR:
            msg = "This method is only meaningful "\
                  "for in-page memory error exceptions."
            raise NotImplementedError(msg)
        return self.get_exception_information(2)