hello friends,
    i am very thankful to u if u helps me for writing formulas in crystal reportwhen i am using it in vb.net.
    i dont know how can i use formulaefields in crystal report,so i will be very thankful to u if u helps me.
                       wishing u all a HAPPY NEW YEAR,
                         U R S FRIEND ANIL

The documentation in .NET for crystal isn't very good. You may be able to download a PDF from crystal's website, which used to be CrystalDecisions, but it's currently be reworked by Business Objects, the new owner.

Good luck.