We're talking about Hyperlinks, I take it?
Are you familiar with application EVENTS? If not, I think you'll find a
description and how to use them on the mvps.org/word website. You should be
able to use the WindowChange event to detect when you switch into your "main
window" and use it to close all other windows, or the one you just left.
(last update Jan 24 2003)
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