Linux Key codes for remote control?

Hello,

Is there any list of key codes that xbmc accetps? I mean codes like this:

KEY_VOLUMEUP - volume up
KEY_VOLUMEDOWN - volume down
KEY_MUTE - mute

...etc

What xbmc funcions can be controlled via key codes like this? I need to setup keymap for my remote and I need key codes for change subtitles, set zoom, set contrast, brightness etc... is there any list with all available codes? Or better: is there any way to configure this? (for example, set KEY_I for image contrast increase, KEY_D for image contrast decrease etc).

Of course, I mean key codes available from udev and keymap files in /lib/udev/rc_keymaps

I found this: http://wiki.xbmc.org/index.php?title=Keyboard.xml

This is nice, but is this possible to invoke some settings directly? I mean picture brightness (down and up), picture contrast (down and up), picture zoom (down and up) while full screen video is played? I can't see this in your description?

See:
http://wiki.xbmc.org/index.php?title=Action_IDs
http://wiki.xbmc.org/?title=List_of_Built_In_Functions

Sorry, I still can't figure it out. There are a lot of actions for full screen video, like stepforward, stepback etc and I can put them into <keyboard> tag. But I'm looking for actions to change some picture settings like brigtness, contrast etc, and there is no action for this?

So what should I put to <keyboard> tag to (for example), directly increase brightness? Can you provide some tip for me?

There is no action to increase the brightness. Generally if something isn't listed in the Actions or Builtins Wiki pages it can't be done from a keymap.