Question

These classes are complex widgets, composed of simpler widgets; dialog boxes, generally.

QColorDialog	Dialog widget for specifying colors
QDialog	The base class of dialog windows
QErrorMessage	Error message display dialog
QFileDialog	Dialogs that allow users to select files or directories
QFontDialog	Dialog widget for selecting a font
QInputDialog	Simple convenience dialog to get a single value from the user
QMessageBox	Modal dialog with a short message, an icon, and some buttons
QProgressDialog	Feedback on the progress of a slow operation
QTabDialog	Stack of tabbed widgets
QWizard	Framework for wizard dialogs