> thanks for ur help...if u dont know pls keep quiet..
I wish I could say the same to you.
First: you are not the person to decide whether someone here treads your question with priority or not. If you say "urgent", I say "fsck off". Your time isn't worth more than anybody else's.
Second: people with common sense ask the right persons for informations, especially if they want that information quickly. Asking for product support at some unrelated forum is pretty much like asking for donuts in a butcher shop.
So I googled for Datavision... it's on SourceForge. And it has a user manual. Read it.
http://datavision.sourceforge.net/DataVision/DataVision.html
When I read your question I didn't know the answer. But fortunately for you, that didn't deter me from spending the 30 seconds to find the answer. Remember that Google is your friend.