VS 2008 find nearest value database access

hello..
great community with great people..

I have problems with the communication between VB.net and database access 2003.

How do I find closest/nearest value or on the form 1 (value.text) with
data on form 2 (value of datagridview (access)).
Matching results are stored in the form of 1 (result.text) .. stored in the form 1 (result.text) ..
I attachment a picture of sample form but without program code..

I am sorry, If I am seeking help in simple thing or not able to explain it enough.

thank you very much.
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