Display Represents the manager of the display and input devices of the system. Displayable An object that has the capability of being placed on the display. Font Represents fonts and font metrics. Gauge Implements a bar graph display of a value intended for use in a form. Graphics Provides simple 2D geometric rendering capability.
Image Holds graphical image data.
ImageItem Provides layout control when Image objects are added to a Form or Alert . Item A superclass for components that can be added to a Form or Alert . List A screen containing a list of choices. The superclass of all high-level user interface classes. An item that can contain a string.