extern DELPHI_PACKAGE TScreen* Screen;
Represents a screen device.
The Screen variable is a TScreen component that represents the screen of the system on which the application runs. By default, applications create a screen component based on information about the current screen device and assign it to Screen.
Use Screen to obtain a list of displays used to comprise the desktop, coordinates, dimensions, and other properties of displays. The DisplayCount property returns the number of displays and Displays provides an access to properties of all displays. See also Multiple Display Support