code for rotecting program

hello,

Ineed a code for protecting my program made in access .what i need is the way how to limit my program ex:2 month and if the buyer pays for then i can release for few more months,and if not paid i want that program after expiration of time to be closed (locked) automatically.

Thanks :eek2:

I have an Excel model published on a website that needs to expire every 3 months and then gets replaced with a new version.
To achieve this I have a constant in my code called "ExpireDate" which I set to the date I want the model to expire.
I also have a Boolean variable called "Expired" which is set as follows when the file is opened.

VB Code:

Expired = (Now >= ExpireDate)

For each Sub in the model I include the following code before the main code is run.

VB Code:

If expired Then
    MsgBox "This model has expired, please visting the home page for the latest version"
    Exit Sub
End If

This prevents any code from running after the expire date. :cool: