Multi-select treeview - Drag and Drop

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From: Allan Phillips (allan.phillips_at_adobe.com)
Date: 09/24/04 

Date: Fri, 24 Sep 2004 13:39:05 -0400

I would like to add multi-select support to my tree control like the way it
is allowed for in Windows Explorer. I handle the SHIFT and CTRL select to
get multiple items selected alright.

My problem is that when I attempt the drag with a mousedown on one of the
selected items without SHIFT or CTRL pressed the selection gets changed to
be just the item the mouse is over. Only the one item gets dragged to the
new location. How can I suppress that change in selection at the start of
the drag and begin a drag with several items selected?

Thanks for any help.
   Allan.

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