restricting the use of a standalone

[Nicolas R Cueto]

Is there a way of "copyrighting" a standalone?

I was thinking of inserting an "if the short date is x then quit" line
so that, after a trial period, the stack/standalone would no longer
start up. Are there other/better/politer ways of controlling access?

Thank you.

-- 
Nicolas R Cueto
Takakura JHS/SHS
Nagoya, Japan