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    auto db = QSqlDatabase::addDatabase( "QODBC" );
    db.setDatabaseName("DRIVER={SQL Server};Server="+config.ip+";DATABASE="+config.name);
    db.setUserName(config.login);
    db.setPassword(config.password);
    db.setConnectOptions("SQL_ATTR_LOGIN_TIMEOUT=5;SQL_ATTR_CONNECTION_TIMEOUT=5");
    return db.open();

QT       += core gui sql
unix: LIBS += -lodbc
#unix: LIBS += -lsybdb
win32: LIBS += -lodbc32
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = testBD
TEMPLATE = app
SOURCES += main.cpp

#include <QApplication>
#include <QDebug>
#include <qsqldatabase.h>
#include <QSqlError>
#include <QTime>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QSqlDatabase db;
    db = QSqlDatabase::addDatabase("QODBC");
    db.setDatabaseName("DRIVER={SQL Server};Server=1.1.1.1;DATABASE=Obmen");
    db.setUserName("user");
    db.setPassword("password");
    db.setConnectOptions("SQL_ATTR_LOGIN_TIMEOUT=1");

    QTime t; t.start();
    db.open();
    qDebug()<<t.elapsed()*0.001;
    return 0;//a.exec();
}

    db = QSqlDatabase::addDatabase("QODBC3");
    db.setConnectOptions("SQL_ATTR_LOGIN_TIMEOUT=5");
    db.setDatabaseName("DRIVER={SQL Server};"+DatabaseAddressString+"Uid=****;Port=***;Pwd=****;");