How to get/set brightness from Objective-C?

jpimbert wrote:
I traced the modifications on the file system with the fseventer utility, while changing the brightness in the System preferences...

That's a neat trick!

jpimbert wrote:
...: there are none!
It seems the brightness System Preferences acts directly on the hardware.

OK, I can see that System Preferences does not modify the file system to change the brightness. But still, the System Preferences app is software, so there must be some means (i.e. some software library) that allows this piece of software to interact directly with the hardware. That's the question. In other words, how could I write an app like SystemPreferences that interacts directly with the brightness control on the hardware?

G.

Man, I don't know what Google-fu you used, but that was IT! Amazing. Thank you! (Or should I say "merciiii"!)

G.