software licenses

Thanks so much for your reply. I tried doing that and it gave me this error: An unhandled exception of type 'System.ComponentModel.LicenseException' occurred in system.dll Additional information: An instance of type 'LicensedControl' was being created, and a valid license could not be granted for the type 'LicensedControl'. Please contact the manufacturer of the component for more information. How shud I proceed ? what am I doing wrong?

.NET Framework have a licensing algo that you can utilize. See ms-help://MS.VSCC/MS.MSDNVS/cpguide/html/cpconlicensingcomponentscontrols.htm in msdn help. Federico

Thanks so much for your reply..! but this is a windows application so how will I be able to create a License file ? any snippets or code would really be helpful..! Thanks,

Nice! And what if the user does not have Internet connection?

create a webservice that accepts and validates a key. The first time the program runs call that web service and create a license file if the key authenticates. This would make the user of your program be online to do this however. HTH