handle in GeneralPlugin?

Background:
I was looking for a plugin to repeat clips from tracks
and found RepeatIt, which does roughly what I want.
However it requires a seperate window to be open and
occassionally blocks the soundcard for some reason, so
I was thinking of writing my own.

Question:
I would like to be able to intercept a keypress from the
XMMS player window.  Is this possible?  And what does
void *handle in GeneralPlugin <plugin.h> do?  (I was
hoping it was a window handle).

-- 
imalone