>Hi,
>
>How to gen. ourt the hash easily ? any existing class or program code ?
>or I use my user defined formular ?
>
>Please advise.
>
>Derek

Well there are lots of ways - you can use the simple hashing function in VFP SYS(2007) using the 32bit hash option (but this is not guaranteed to be unique but might be good enough security for your purposes). You can use an external DLL like the MD5.DLL to calculate MD5 hashes. You can use 3rd party tools like Chilkat tools http://www.chilkatsoft.com (which is what we use). You can use your own hashing formula etc. It depends on the level of security you think you need. All this might be totally pointless without your code being protected as well. So you need to think about the level of security required and who you are trying to defend against.