Charles

The short answer is no. Excel is insecure. You can search google groups on
"Excel Prevent Copy" and read about it, but it will essentially tell you
that you need to write the application in another environment.

--
Dick Kusleika
MVP - Excel
www.dicks-clicks.com
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"Charles Jordan" wrote in message
om...
We have a project which uses Excel to teach economics. It resembles a
school/University textbook, and has taken many years of VBA
development. Does any one have any ideas as to how we could obstruct
if not prevent the kid on the end of a row of 30, with a legal copy
from simply duplicatimg his CD. He'll do it anyway, but the holy grail
would only enable the fully paid up and registered copy to fire up at
startup.

Possibly by using the Web, and requiring the user to log on and
download something onto one PC only, - and then what...a cookie ? ..He
may have to disable Norton first?
Rewrite some key code as a .exe file in Delphi ? which would be
installed at the outset and which could disable the installation if
asked, or at least render it inoperable ?.

The product is sufficiently unique that we could require a small
amount of discomfort upon purchasing it....but mass copying would be a
bad hit.

IF any NG memeber has any ideas, or experience of this they would be
greatly appreciated. Thanks

Charles Jordan