>Mark ,Jim , Vlad,
>That was splendid !
>But I do not wish to put any part of my source at customer's
>place b'cause it is difficult to maintain large number of
>report formats.
>
>Any other solution ?
>Thanks again.

Diptesh,

You have a catch 22 here, you don't want to put the source at the client site, and yet you want the client to be able to modify the source. Well, you have give up one of them because you can't get both.