I've started getting serious about learning Cocoa today. I've found the API to be easy to use, but requiring alot of research to know the sometimes very long method names etc. What resources aside from Apple's site do you use? My main question is how do you "open" a file in Cocoa. Right now I have a NSOpenPanel that's working as I want, but how do I have the "OS" open that file? Like as if I've opened it on the desktop.