Thanks @Bonnie, You are AWESOME!

Glad you found out ! Could you explain what happened in your code to trigger this ?

@joeQ As it turns out, I just tried the opposite. I had one newed Message Box for everything. In the place that had the funny location, I made a separate newed Message Box and it ended up in the correct place - the middle of its parent.

Yes, i've found how to change the text

Thank you.

@jsulm pbar is in the VBoxLayout of the dialog, q is a QSqlQuery. I Just modified the code so that the dialog also contains the yes and no buttons and no QMessageBox is shown. When i now show the QDialog instead of the QMessageBox and then execute the slot, everything looks good and the progressbar is updated at each step of the foreach() loop.

@Harry123 I did it putting this in main.cpp and that's all folks ;-) QApplication a(argc, argv); a.setStyle("fusion");

@Chris-Kawa said: QThread docs Oh!! Then I need to make a worker class and do something like: thread = new QThread(); thread->start(); worker = new Worker; worker->moveToThread(thread); // this is the initialization of a QWizardPage in the QWizard WizardPageClass1 *page1 = new WizardPageClass1 ; page1->setWorker(worker); And then where I have the lengthy operation, emit a signal (DoOperation for example) and in its constructor make a connect like connect(this, DoOperation(), worker, doWork()) if doWork() is where I have the lenghty operation with?