From: "James C. Sewell" 
At 10:36 AM 7/25/97 -0700 Chris Antos (Exchange), whom God loves, said:
>there's no way to *truly* make it readonly, but this macro does a fair
>job.
Chris is right, but here's another possibility to consider.  It does
fall prey to other macros "undoing" what it does but here it is anyway.
(In a macro that's autoloaded...)
proc ReadOnly()
    AbandonEditor(0)
end
proc WhenLoaded()
    Hook(_ON_FILE_SAVE_, ReadOnly)
end
This is far from bulletproof but for a quick fix it may work well enough
for what is needed.  Unlike the other macro this one will let you make
changes but it will not save them.
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