how can i make my program shareware

hey everyone again, i need another favour
to finish my program i need to know how to make a shareware serial number so when its shareware a message box pops up every 2 minutes and when registered the message box goes away!!!

I think http://www.activelock.com has options to make your program shareware. If you don't like that, make your own, it'd be very easy, you'd just have to find a really good serial number.

[Steve Stunning]

Ya, I made my own and used the serial number of the hard drive.

Fun project

You can store a flag in the registry to determine if the App is registerd or not.

hmm thanx for all this help im not sure how to do the flag in the registry im checking out this activelock site
it looks pretty good, but if it doesnt work ill come back and ask again!!
thanx heaps

well i downloaded active lock 1.6 and i had a little play and couldnt work it out so now im downlaoding 1.5 which is supposed to have two sample projects in it, maybe that will help.....