$window-id - Current window identity
$window-id retrieves the identity of the current window, this is a integer value (1..n) that is automatically allocated when a window is created using split-window-horizontally(2) or split-window-vertically(2).
The $window-id is guaranteed to be unique and is typically used in macros to locate a previous window.
Copyright (c) 1998-2006 JASSPA
Last Modified: 2004/01/17
Generated On: 2006/10/07