Find closest value database access

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

thank you very much.