Trial version software

[Billy Masopust]

I am trying to develop a beta version of some software in
Visual C#. The software needs to expire and basically
self-destruct in 15 days. How do I get the program to do
this? The program needs to check the system date every
time the application is ran to see if it has expired. I
also need help with programming registration keys in this
software, much like the ones needed to install Windows and
Office. Thanks!

 

[John Timney \(ASP.NET MVP\)]

You can buy solutions for this type of thing - if you would rather roll your
own, then you could provide a Md5 registration mechanism on your site that
gives a key generated from the start date, and some other values mimicked in
your code, and then use that Md5 to work out if present date is within the
15 day limit when your code runs.

Regards

John Timney (ASP.NET MVP)