Article # 527, added by Geoworks, historical record
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Mouse events to only go to top Vis object.



Q. I have several Vis objects that overlay each other. I want mouse
   events to get detected only by the top (from the user's viewpoint)
   object and ignore the rest. How can I do this?

A. Clear the VA_DETECTABLE bit from any vis object that aren't eligible
   to be clicked on.