class CTransactionCheckParam : public CSerializable
{
   public:
      /// Initialize check params from actual values.
      CTransactionCheckParam(int check_number, int subcheck_number);

      /// Perform self-deserialization via passed in serialized data.
      CTransactionCheckParam(char const* data);

      virtual void XMLDefine();

      int CheckNumber;
      int SubCheckNumber;
};

void HandleData(char const* data)
{
   // Do stuff with 'data'
}

void AutoSerialize(CSerializable const& data)
{
   HandleData(data.Serialize());
}

int main()
{
   AutoSerialize(CTransactionCheckParam(50, 100));
}