How to hook the mouse in OS X?

I'm looking for functionality that you'd get on Windows by hooking the
mouse. I want to write a utility program that changes the way the mouse
interacts with open windows. Specifically, I want a middle click on the
title bar of any window to make that window push back in z-order. This
behavior should work for *any* window, not just the windows of the
application I'm writing. So if I middle click on the title bar of a
Safari window, it goes back in z-order, and if I middle click on the
title bar of iCal, it goes back in z-order, etc.

I'm not really sure where to look to find this. Any help appreciated.

Simon Slavin:
>
> The way to do it under Cocoa wouldn't be to hook the mouse, it would be to
> use a different NSWindow. I would want to do the following:
>
> 1) subclass NSWindow,
> 2) implement an otherMouseDown that checks the position and implements
> your layer change 3) reroute all future creation of NSWindow so that it
> creates one of my subclass instead
>
> The first two are relatively easy and can be debugged inside a toy test
> application.

The third can be achieved using posing. It's probably possible to do
the posing from an APE (Application Enhancer module), but of course
you'd have to find a separate solution for Carbon apps. Patching the
default Carbon Event handler for windows might do it.


--
Jens Ayton