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[plt-scheme] OS-dependent behavior of canvas%'s on-subwindow-char method (v3.99)

From: Gregory Cooper (greg at cs.brown.edu)
Date: Sat Apr 5 13:18:10 EDT 2008		 
Hi,

In v3.99 under MacOS and Linux, I can override the on-subwindow-char
method in a canvas% to respond to key events.  However, if I do the
same in Windows XP, my callback doesn't get called.  Is this
intentional?

Thanks,
Greg
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