I wish I had a clue about how any of the graphics stuff works. All the demonstration code I've seen always says: "Copy this snippet and "Hey Presto! ... it wi

I wish I had a clue about how any of the graphics stuff works. All the demonstration code I've seen always says: "Copy this snippet and "Hey Presto! ... it will all work." None of it explains how it works, and none of the examples ever make sense to me. Cargo Cult Programming at its finest, and I'm really not comfortable with it.