[plt-scheme] adding non-standard callbacks

If I wanted to add a callback to a button for when the user right-clicked,
how would I go about doing that? (note: right click does not activate the
button, only left click does, and therefore the normal "button callback"
won't work).



I figure I probably need to intercept the event before the button is able to
interpret it, and if it's not a right click, then pass the event on.  So far
I found:

(event-dispatch-handler (lambda (x) (display "that was event: ") (display
x)))

But didn't see a way to get the event out of "x".

Corey

-- 
((lambda (y) (y y)) (lambda (y) (y y)))
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