Installation with Registration

Hi All,

My name is Derek. Currently I have developed a Visual Basic Application. I would like to make installation packages that will ask the user to key in a registration code of some sort. This is to prevent the installation package to get in ‘unauthorize hands’. Thus the package is only available to those ppl who have paid for it

If you know of any tool that can do this pls let me know. Other security methods to protect installations would be greatly appreciated too.

Thanks

Derek