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Date:Mon Jan 15 15:45:53 2002 
Subject:changing colour 
From:Michael H Lees 
Volume-ID:1020115.01 

Hi,

I have a sim_movable_agent which I would like to change the colour and
label (the string in rc_pic_strings) of at runtime.  The slots
rc_pic_lines and rc_pic_strings contain this information, I have written
a procedure which changes these variables to change the colour and the
label. The problem is when I change the colour or label it leaves the a
'residue' of the old colour/label on the background. I've been looking
for a standard procedure which updates these variables but can't find
one. I don't want to redraw the whole background is there another way of
preventing the residue?

Thanks

Mike