How send/receive (if need) native client messages?

[Andrzej]

I try code:
  hbase::pb::GetTableNamesRequest getTableNamesRequest;
//<---- how send request?
  hbase::pb::GetTableNamesResponse getTableNamesResponse;
//<---- how receive response?
  int n = getTableNamesResponse.table_names_size();
  std::cout << n << std::endl; // <------ is 0
  for (int i=0; i<n; i++)
  {
     ::hbase::pb::TableName const name =
                        getTableNamesResponse.table_names(i);
     bool has = name.has_namespace_();
     std::cout << has << std::endl;
  }

or is another way to list table names?