How to simulate user input in objective-c?

On windows, and with c#, I was able to capture another window's "screen", use that for processing, and then send user input events to that window. (which were generated by the program).

I would like to do the same with objective-c and within Mac OS X. So! Any resources or even a name for what I'm trying to do would be great. It's very frustrating to try and find information on this when the only ways i can think to phrase my searches a开发者_运维百科re too ambiguous.

Thanks!

EDIT: As a specific example, there might be a particular game that I want to make an AI for. In that case I would need to be able to send mouse and keyboard events to the game.

If you're looking to do automated user interface testing, look at Squish, eggPlant, expect and OS X Accessibility. If you're looking to programmatically control another program, use scripting (if you wrote the program to control, add scripting support; otherwise, see what scripting support the program offers), or try Automator.