I'm writing application which is shareware (30 days trial) and have a registration system,
in this system, at first I will get volume information (GetVolumeInformation) and use this
set of number to calculate (with my own equation) an Activation Code to register
Problem is, after user format their haddisk, and re-install my program again. This Volume Number changed.
That means user must register again (pay for licence again). I don't want to do this, so i try to find some
set of number which NOT change when user format their drive...
The last one, if you have my answer, will your answer compatible with ALL Windows Version?
Please, someone tell me some direction?