Hi Rahul -

The formula I used involved VFP's DTOR() and RTOD() functions.

For the encryption, check out http://www.hallogram.com/foxpro/ and look for Cryptor. I think there also may be some free products out there, maybe check here in the files section.

Good Luck!

>Thank for your advise. My idea is also sone what same but formula part is extra. But as I was good maths student. I doubt arised. In a formula calculation their can be two key which can give same result. But very rare case. I also love to solve brainer teasers. So if you want you can give your formala and I will try to solve it. But for my software that high security is not needed.
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>But for it I have to write a full code. Atleast tell me is their any option to make a table encryted or again some code for it. If any other software available.