Generic FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 9.0
Unrevised from 8.2 to 9.0.
8.2 version

screenp

Arguments: object

Returns true if object is an instance of the screen class, and returns nil otherwise. This may be useful for determining whether the owner or parent of a window is the screen rather than a window, for example.

Currently there is only a single screen object, but a possible future enhancement would be the support of multiple monitors, where there is a screen object for each monitor. In that situation, calling screenp would be preferable to an expression such as (eq my-stream (screen *system*)) (see screen and *system*).

See also windowp.


Copyright (c) 1998-2012, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 9.0. This page was not revised from the 8.2 page.
Created 2012.5.30.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 9.0
Unrevised from 8.2 to 9.0.
8.2 version