Apple AppleScript Finder Guide - Manual (Page 35)

C H A P T E R 2
Finder Objects
The Finder Application Object
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content space is a special case and the Finder doesn’t consider it a member of
class Window (although you can refer to window of desktop in a script).
The desktop “window” and the desktop are actually the same object, whereas
all other windows are distinct from the objects they belong to and may have
different properties. For example, the Position property of a disk is different
from the Position property of the disk’s window.
The desktop doesn’t have most of the characteristics of windows, so you can’t
refer to properties such as Bounds, Position, and so on. If you are performing
operations on Finder windows that involve these properties, you may want to
get a list of windows that doesn’t include the desktop. Therefore, the Finder
doesn’t include the desktop when you request a list of windows:
tell application "Finder"
windows
end tell
--result: {information window of startup disk of
application "Finder", window of folder "Projects" of
startup disk of application "Finder", window of startup
disk of application "Finder", window of disk "Applications"
of application "Finder"}
The list of window references returned doesn’t include the desktop, but it does
include information windows and any other windows that are open. If you
want to get a list restricted to windows that belong to containers, request a
list of container windows:
tell application "Finder"
container windows
end tell
--result: {window of folder "Projects" of startup disk of
application "Finder", window of startup disk of application
"Finder", window of disk "Applications" of application
"Finder"}