




 
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) - 25 Feb 2015