Window Systems

Emacs works with several window systems, most notably the X Window System. Both Emacs and X use the term "window", but use it differently. An Emacs frame is a single window as far as X is concerned; the individual Emacs windows are not known to X at all.

Variable: window-system

This variable tells Lisp programs what window system Emacs is running under. The possible values are

x

Emacs is displaying using X.

pc

Emacs is displaying using MSDOS.

w32

Emacs is displaying using Windows NT or Windows 95.

nil

Emacs is using a character-based terminal.

Variable: window-setup-hook

This variable is a normal hook which Emacs runs after handling the initialization files. Emacs runs this hook after it has completed loading your `.emacs' file, the default initialization file (if any), and the terminal-specific Lisp code, and running the hook term-setup-hook.

This hook is used for internal purposes: setting up communication with the window system, and creating the initial window. Users should not interfere with it.

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