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Windows hooks allows you to poke inside other processes and sometimes alter their behaviors.
Is there such thing for Mac OS X?
Thanks!
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Show or move all open windows Show all open windows for the current app: Press Control-Down Arrow. If App Exposé is enabled in Trackpad settings, you can also swipe down with three or four fingers. To return to the desktop, press the keys again or swipe up.
Trying to use the Finder to open multiple instances of an application on Mac OS X will simply cause the first instance to come to the foreground. To get around this, use the open command from the command line with the -n option. The -n option opens a new instance of the application even if one is already running.
Command-H: Hide the windows of the front app. To view the front app but hide all other apps, press Option-Command-H. Command-M: Minimize the front window to the Dock. To minimize all windows of the front app, press Option-Command-M.
Quickly switch between app windows On your Mac, do any of the following: Switch to the previous app: Press Command-Tab. Scroll through all open apps: Press and hold the Command key, press the Tab key, then press the Left or Right arrow key until you get to the app you want. Release the Command key.
SetWindowsHookEx is more like the old InputManager hack, in the sense that you change the code of an app from inside a shared library / a plugin loaded to it.
See SIMBL for a ready-made code injector to another process. For Objective-C classes, you then need to use method swizzling. I haven't tried replacing C functions / C++ classes myself, but surely it can be done using mach_override. See also this blog post.
But usually if you want to modify a GUI app, tapping into Objective-C classes would be sufficient.
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