Scott Kane wrote:
Hi Mark,
...all right, technically it *is* possible to do save to an
executable if you pull the right tricks. That's how resource
editors work. Are you saying that an executable can modify
*itself*, though? That would involve fiddling with runtime
permissions at a very deep level, and I'm not at all
convinced you could get away with it.
See:
<
http://www.componentace.com/bde_replacement_database_delphi_absolute_dat
abase.htm#overview >
I wrote the developer of Absolute DB, and he says:
RG> I had the impression that EXEs cannot modify themselves
RG> at runtime -- how does Absolute Database do that?
Actually, Absolute DB doesn't do that, the database attached
to .exe can be used in read only mode.
So in that usage it's the same as Rev.
A Microsoft tech note explains one way to modify code in memory,
prefaced with a note that it's "not recommended":
<http://support.microsoft.com/default.aspx?scid=kb;en-us;127904>
And that's only in memory; I could find no reference from Microsoft on
how to have an EXE modify itself on disk.
If you search hard enough you can find a few techniques for apps to be
modified at runtime, but they all step outside the recommendations of
the OS vendor.
Microsoft says apps shouldn't modify themselves, and Rev merely follows
suit.
--
Richard Gaskin
Fourth World Media Corporation
___________________________________________________________
[EMAIL PROTECTED] http://www.FourthWorld.com
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