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Compare any value with access using vb.net

ghoweer, on Jun 16, 2009 7:01:32 am BST 
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Hello,
I am new in vb.net,my company use Excel to save there data in master and detail form i write a code to tranfer data from excel file to be in tabular by useing my vb.net program, my problem IS HOW CAN I COMPARE EVERY NEW RECORD
WITH MY ALL DATABSE EVERY TIME I USE MY VB.NET PROGRAM(WHICH I use to tranfer excel data from master/detail form to tabular form) because i don't want to a doublicate value.
*my DB in access 2003
*vb.net 2003 !

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