Hi Steve,
You can also get an idea about the structure of .FLI and .FLC files by
downloading the following files;
FLILIB.ZIP Autodesk Animator library ~ Discusses the structure of .FLI
files
FLCSPC.ZIP Software Dev. Kits library ~ Discusses the structure of .FLC
files
As mentioned by the other respondants, the Animation Support Library gives more
information.
Bob