Code

[Melitón Cardona Torres]

Many applications let the user try them a number of times and then  
request a code to continue working.

I understand that an application cannot alter its data o store new  
ones, so I wonder whether a file has to be created to detect  
henceforth whether the code is correct.

If it is so, is it possible to make files invisible in Revolution?

Thanks in advance,

Ton Cardona