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From: Christopher Self <cself@btinternet.com>
Newsgroups: comp.sys.acorn.programmer
Subject: Re: dragging a text icon by its outline
Date: Sun, 07 Aug 2022 21:37:43 +0100
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This is now almost working:

 block!8  = minx% - (scrollx% - icminx%)
 block!12 = maxy% - (scrolly% - icminy%)
 block!16 = minx% - (scrollx% - icmaxx%)
 block!20 = maxy% - (scrolly% - icmaxy%)

But it doesn't cope with an undersize window, and I still don't understand
it.

-- 
Christopher Self