manipulate database in c++ program

try
                {
                    nFlag = 1;
                    sql.Format(_T("select * from slptext where slptext.CountryID = (select CountryID from country where Country=\'%s\')"),m_langname);
                    m_pRecordset->Open(sql,CADORecordset::openUnknown);
                    sql.Format(_T("select * from country where Country=\'%s\'"),m_langname);
                    m_pRecord->Open(sql,CADORecordset::openUnknown);

                    m_pRecord->GetFieldValue(0,countryID);

                    if(!(m_pRecordset->IsBOF()))//若记录集指针未指向数据库中的首元素
                    {
                        m_pRecordset->MoveFirst();//则将其指向首元素位置
                    }


                    while (!m_pRecordset-> IsEOF())
                    {
                        m_pRecordset->GetFieldValue(2,origTxt);
                        if (origTxt == sEng && (origTxt != _T(""))){

                            nFlag = 0;
                            break;
                        }
                        m_pRecordset->MoveNext();
                    }

                    if (nFlag==0) {//////////////////////
                        m_pRecordset->SetFieldValue(3, sOL);
                        m_pRecordset->Update();
                        //AfxMessageBox(_T("插入Translate Text数据库成功!"));
                    }
                    else{
                        m_pRecordset->AddNew();
                        m_pRecordset->SetFieldValue(0, countryID);
                        m_pRecordset->SetFieldValue(1, szHash);
                        m_pRecordset->SetFieldValue(2,sEng);
                        m_pRecordset->SetFieldValue(3, sOL);
                        m_pRecordset->Update();
                        //AfxMessageBox(_T("插入新记录数据库成功!"));

                    }

                }

                catch(_com_error *e)
                {
                    //MessageBox(e->ErrorMessage());
                    CString errMsg;
                    errMsg.Format(_T("数据库操作失败：%s,%s"),e->ErrorMessage(),e->Description());
                    AfxMessageBox(errMsg);

                }

                m_pRecordset->Update();
                m_pRecordset->Close();
                m_pRecord->Close();
                m_pRecord = NULL;
                m_pRecordset = NULL;