You reallly should document your code

As I sit here late on a Saturdya trying to figure out exactly WHAT this code I wrote 10 years ago is supposed to do.
It should be a reasonably straightforward find routine in a linked list of MIDI objects that I create, but I appear to be doing something clever to multi-search and jump-start the next search. And I don't want to waste time figuring out why the hell I'm doing some things, and I didn't write any comments nor use symbolic constants, just raw numbers.

Arg. THink I'll just write it from scratch, it's easy enough.