




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 (Unix version) - 3 Aug 2017