The function screens
returns as a list all the active screens for
library
.
A library name is a keyword naming a library, currently :win32
on Microsoft Windows, :gtk
on GTK+, :motif
on Motif and :cocoa
on Mac OS X with the native GUI.
library
can be a library name, or a list of library names, or the keyword :any
, meaning all the libraries. The default value of
library
is the result of default-library.
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017