@SGaist thank you SGaist for your kind replay honestly all the tense & anxiety & obsecurity is gone thanks to matthew & you i know now what to focus on & what's the matter with Qt Qt is uses RAW C++ codes & don't hide any mechanism from the user hence they required you to communicate with it in RAW format codes it's really helpful to talk with experts ^_^

Ok, I've found that the results are stored in files Makefile.Release, Makefile.Debug and everything is explained here.

As long as var inherits QObject you can do as followed. QSignalMapper *sigMap = new QSignalMapper(); connect(sigMap,SIGNAL(mapped(QObject *)),this,SLOT(compareLimit(QObject*))); void storeRoStruct() { for (int x=0; x<DB.length(); x++){ conditionList.append(DB.record(x); connect(conditionList.at(x).var, SIGNAL(valueChanged()), sigMap, SLOT(map())); sigMap->setMapping(conditionList.at(x).var, conditionList.at(x).var); } } And in the Slot make a dynamic_cast to var.

@maximo Ok :) I am going to test again with stylesheets. It would be very nice it it worked as docs says. Or at least to understand why it did not. Update: Ok, one must unpolish/ polish each widget as doing it to Mainwindow doesn't seems to work. But it also works with setStyleSheet(styleSheet()); in MainWindow to reload (whole) style sheet. Update 2: Ok. Having qframes with bool error property. It will update in Designer, if setting it. No code. Sheet on MWindow. So it does work with properties it seems.