make mde expire after 30 days

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi
I am have developed a useful database and saved it as an mde file. I want to sell this database, but I would like to make a demo version that expires, preferably after 30 days. Is this possible? I have limited visual basic skills....but I am desperate to know how to do this!! Can anyone help me?
Stevo
 
You can always (a) store the date of install and (b) compare that date to
the current date on startup using the DateDiff function ... if it's >30,
then inform the user and abort the startup. However, there's nothing to stop
someone from setting their system date far in advance, installing your
program, and then resetting the system date (so, in effect, your program
would literally run years before running into that wall). An easier and more
effective method is to limit the number of records the user can enter.

However, if you have limited VB skills, I would recommend that you brush up
on your skills before considering selling your application to others. This
requires quite an extensive knowledge of Access and it's workings with
various platforms, operating systems, etc etc ... not to mention
installation troubles, reference troubles, etc etc ... just a friendly word
or advice.


Stevo said:
Hi.
I am have developed a useful database and saved it as an mde file. I want
Click to expand...
to sell this database, but I would like to make a demo version that expires,
preferably after 30 days. Is this possible? I have limited visual basic
skills....but I am desperate to know how to do this!! Can anyone help me??
 
Hi Stevo,

Scott is correct about users possibily messing with the computer date.
However, you can code around that as well.
Read this thread on Google at the following link:

http://tinyurl.com/29qap

MVP John Viescas provided me with some nifty code to kill the database if
the users mess with the computer date.

Also, you may want to see if this link on Tony Toews' site helps:

http://www.granite.ab.ca/access/demo.htm

It's WAY beyond my experience level, but hopefully it will
get you going in the right direction.

Good luck,
Jeff Conrad
Bend, Oregon

Stevo said:
Hi.
I am have developed a useful database and saved it as an mde file. I want
Click to expand...
to sell this database, but I would like to make a demo version that expires,
preferably after 30 days. Is this possible? I have limited visual basic
skills....but I am desperate to know how to do this!! Can anyone help me??
 
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