find an empty cell

[colinod]

I have the following to determine unused parts of a database and was wondering how to find it if the cell is just empty instead of having the word unused in it

<%
if InStr(localRecordset("station3"),"unused") > 0 then %>

[AricC]

Empty cells in your DB should have NULL values not "unused" if you want to test for a null in asp use the IsNull() function