Function closures are a nice thing to have, but if the interface for
callback functions is designed for OOP, one can easily simulate it -
simply provide a callback object instead of a callback function. The
object can (via subclassing) contain all desired information for use
by its callback method.

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   *   wonder everyday   *   nothing in particular   *   all is special   *
                Marc Wachowitz <mw@ipx2.rz.uni-mannheim.de>