In this Qt6 video we are going to learn How to Set Icon to Qt6 GUI Window, also we will learn how to use different options like adding the width and height for the window and also setting the opacity for the window, for adding an icon to Qt6 GUI Window we can use setWindowIcon() method, setWindowIcon() is method in the QWidget class of the Qt6 C++ framework that sets icon for a window or top level widget.

setWindowIcon() method takes an instance of the QIcon class as its argument, which represents an icon or an image that can be displayed in the title bar, taskbar or system tray of a window or toplevel widget.