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updating dialog items

   From: Brandon R. Brown(summer student-90) <brandon@ptolemy.arc.nasa.gov>

   I have tried to use the "dialog-item-draw" function, but it
   is not recognized (i.e. it gets an "undefined" error).

This is an object function defined for dialog items.  You have to
ASK a dialog item to run it.  The function is not defined globally
(it's only defined in dialog items).