What are key codes based on?

[Crow]

I've tried to find out what the key codes used in GScript are based on; without luck. Is there an easy way to translate the key codes to a readable key name? keyname(int) won't do, that's for Graal's default stuff only.

Edit: Found out that it matches Flash's ActionScript key codes pretty much, which I found a resource for. This is helpful, but I'd still like to know if there's a better way or how things work behind the scenes.