Re: Editting an exe

I had no problems. You may be editing the wrong data, try using
something more definitive than four 0 bytes like $12345678. Also, the
data offset is dependent on the name length - in the example foo, it
is 10 bytes.

Mike

-----Original Message-----
From: sftalk-bounce_at_forth.com [mailto:sftalk-bounce_at_forth.com]On
Behalf
Of Jeff
Sent: Thursday, December 11, 2003 7:52 PM
To: sftalk_at_forth.com
Subject: [sftalk] Editting an exe

This is driving me nuts, so hopefully the gurus can help. I'm working
on a registration system for my product. One of the checks is that in
the program there is:

CREATE foo 0 ,

Now, later on in the code is a check function:

: is-registered ( -- flag ) foo @ 0<> ;

Of course it is more complicated than this, but you get the idea. Now,
on my web server, I directly edit the final EXE file and replace the 0
with a different value that is specific to the end-user. I'm finding
the location to put it with a hex editor, searching on "foo" and
moving 12 bytes downstream of the name (where there is 4 00 bytes).

However, when executed foo @ still returns 0. I assume that I'm just
writing the constant into the wrong memory location, but what worries
me is that perhaps SF is doing something I'm not expecting and that I
can't do what I want.

Thanks for any suggestions.

--
Best regards,
 Jeff                          mailto:jma_at_mfire.com
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