Trial Version

[Gensor]

How do I create a trial version of 3 month for my application ?

I want to do it like Norton. If I uninstall the application and reinstall it, I don't want it to reset the trial.

How is it working ? Is it a hidden key in the registry or a DLL in system32 ?

The only thing I know is that I should not name it with a significative name.

[Moorzee]

never done it myself but would presume you would stick an entry in the registry with the date and check this on start up of your app and install?

[Hack]

Is this a database application?

[Gensor]

Yes, but on install, the database will be replaced with a new one

[Mark Gambo]

Yes, but on install, the database will be replaced with a new one

What type of database will you be using (ie. Access, etc)?

[MartinLiss]

A different approach would be to code the app so that it has only limited functionality until the user registers it. If you like that approach then take a look at the A program registration scheme link in my signature.

[Gensor]

My database is an MS access database.

And Martin, I want to let users have full functionnalities for a limited period of time.

[Mark Gambo]

Then you will probably want to encript the date somehow and store it in either in the database or in a file somewhere on the hard drive and then compare it to the current date. In order to prevent the user from changing the system date/time maybe you can check someother date/time sorce (ie. Internet).