Qt::WindowFlags flags

Qt::WindowFlags is an enumeration type that defines various window flags that can be used to customize the properties of a window or widget in Qt. The flags can be combined using the bitwise OR operator to create a set of flags.

Some common flags that can be used with Qt::WindowFlags include:

- Qt::Window: This flag indicates that the widget is a top-level window.
- Qt::Dialog: This flag indicates that the widget is a dialog box.
- Qt::FramelessWindowHint: This flag indicates that the window has no frame or title bar.
- Qt::CustomizeWindowHint: This flag indicates that the window can be customized using the system menu.
- Qt::WindowStaysOnTopHint: This flag indicates that the window should always stay on top of other windows.

Example usage:

QWidget* myWidget = new QWidget();
Qt::WindowFlags flags = Qt::Window | Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint;
myWidget->setWindowFlags(flags);

This creates a new QWidget and sets its window flags to include the top-level window, the ability to customize the window with the system menu, and the window should stay on top of other windows.