how to subclass a qwidget in ui file

[newcfd]

I made a ui file with designer. It has a push button ui.btnOK.
But in my application I need to create a new class
class MyButton : QPushButton
{
};
to replace ui.btnOK. How do I do it?

Thanks for your help.

[d_stranz]

Reading the Qt Designer docs (http://doc.qt.io/qt-5.5/designer-using-custom-widgets.html) might be a good place to start.

[newcfd]

got it. Thanks a lot