hi,
To stop a macro use Ctrl+Break.
but for the loop, maybe posting your code would help.

regards
Frank

-----Original Message-----
Can someone please help this complete newbie where macros
& VBA are
concerned?
I've obtained a macro from the web which does exactly
what I was looking for
but I now need to tweak it a bit.
[for info: it generates random numbers in certain cells]

a) I would like it to *loop* until certain criteria are
met e.g. "A1=7"
_and_ "B1 20"

b) I would also like to be able to stop it manually [e.g.
by pressing a
certain key] to prevent it going into a permanent loop.

BTW I'm using Excel 2002

Any help appreciated
TIA

Tony


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