How to get standard Mac OS X icons to use in your app?

Question

How do you get standard Mac OS X icons to use in your design / app?

By standard icons I mean toolbar icons from this screenshots:

Is there a location where

Answer 1

Not all of those are standard. For the ones which are, you use +[NSImage imageNamed:] with one of the system-defined image name constants, such as NSImageNameGoLeftTemplate or NSImageNameIconViewTemplate.