The help files, the tutorials that come with the software found within the help files, the index, the tutorials on the tutorials section from this site, tutorial city (which you can find by searching tutorial in newcommer's corner), the huge amount of game-specific tutorials (which although the tutorials focus on making one type of game, the theories and methods learnt in those tutorials can be applied to almost any other games), AND all of the forum posts covering almost every possible beginner's question, are all resources for documentation. If you havent found them through searches I'd advise you revise the phrases you're using to search, instead of typing "DBP Tutorial" just type "Tutorial", instead of "How to make a game" search "Game", etc.
- RUC'