acceder à mysql avec c++ en utilisant QT designer.

static bool createConnection()
{
QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
db.setHostName("ghjjjes.ci");
db.setPort(1521);
db.setDatabaseName("devxl");
db.setUserName("jckai");
db.setPassword("kass144");

if (!db.open()) {
QMessageBox::critical(0, qApp->tr("Cannot open database"),
qApp->tr("Unable to establish a database connection.\n"
"This example needs SQLite support. Please read "
"the Qt SQL driver documentation for information how "
"to build it.\n\n"
"Click Cancel to exit."), QMessageBox::Cancel);
return false;
}
essaye en utilisant QT designer