How I read content of table using IBPP?

Hi
I'm working in Visual Studio 2005 and I'm using IBPP to connect to Firebird database. How I read content of table using SELECT command? Where is the answer from firebird database after SELECT command call?

part of my code:

IBPP:: Database db1;
db1 = IBPP:: DatabaseFactory("localhost", "C:/cpp.fdb", "SYSDBA", "masterkey");
db1->Connect();
IBPP::Transaction tr1 = IBPP::TransactionFactory(db1, IBPP::amWrite);
tr1->Start();
IBPP::Statement st1 = IBPP::StatementFactory(db1, tr1);
tr1->CommitRetain();
st1->ExecuteImmediate("select jmeno from moje where id > 5");
...?...

..How I read the Answer?

Any ideas will be much appreciated.
Best regard

Tomas

I'd start from the manual