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Expire my Application After Thirty Days

To make your application expire after thirty days, store the date the program was first run in the registry, and every consecutive time that the program is run, compare the registry to the expiry date (30 days after your program was first installed).

To accomplish this:

1. Insert the following code into the On Startup event of your project:

days_left = 30;
date_installed = Application.LoadValue("My Application", "Date Installed");
date_installed = String.ToNumber(date_installed);
time_limit = 30; --the length of the trial period, in days

if date_installed == 0 then
    Application.SaveValue("My Application", "Date Installed", System.GetDate(DATE_FMT_JULIAN));
else
    days_left = (date_installed + time_limit) - System.GetDate(DATE_FMT_JULIAN);
end

if days_left < 1 then
    Dialog.Message("Trial Period Over", "This software has expired");
    Application.Exit();
else
    Dialog.Message("Trial Period", "You have "..days_left.." days left in your trial period.");
end

Applies to:

Standard Edition

Professional Edition