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    QSqlDatabase dbconn = QSqlDatabase::addDatabase("QODBC");
    dbconn.setDatabaseName("sqltest");      //ÕâÀïÊǽ¨ºÃµÄDSN
    dbconn.setHostName(QString("127.0.0.1"));
    dbconn.setPort(1433);
    dbconn.setUserName(QString("sa"));
    dbconn.setPassword(QString("wang"));


    bool r = dbconn.open();
    if (r) {
        qDebug() < < "SQL Server 2000 Connect OK!";
        QSqlQuery query = QSqlQuery(dbconn);
        query.exec("Insert into tblTest(F_cName,F_cSex) values('CDE','M')");
        qDebug() < < query.size();
        qDebug() < < dbconn.lastError().text();
    } else {
        qDebug() < < dbconn.lastError().text();
    }

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SQL Server 2000 Connect OK!
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