if you go along with Najdorf's suggestion, store the current date in that file as well. only store it if the current date is greater than the stored date though and then use the stored date to do your checking. that way if they do set the date back it wont have an effect because the stored date will be greater than the current date.
on a side note... Najdorf. you mentioned an invisible file. i was trying to do that very thing not to long ago, but was unable to figure it out. marking the file as hidden is ok, but i was actually trying to make a truly invisible file. were you talking marking as hidden or do you know a technique to make the file truly invisible?
on a side note... Najdorf. you mentioned an invisible file. i was trying to do that very thing not to long ago, but was unable to figure it out. marking the file as hidden is ok, but i was actually trying to make a truly invisible file. were you talking marking as hidden or do you know a technique to make the file truly invisible?