strConn = "PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=" + Server.MapPath("Lam - Copia.mdb") + ";";
                    Conn = new OleDbConnection(strConn);
                    strSQL = "Select LAST(Cod_Ord) From Ordini";
Conn.Open();
Cmd = new OleDbCommand(strSQL, Conn);
                    OleDbDataReader reader = Cmd.ExecuteReader();