| Look at conditional formatting.
You should NOT be storing age. As a general rule we do not store calculated values. You can use the following expression to calculate the age of a person:
DateDiff("yyyy", [Bdate], Now())+Int( Format(now(), "mmdd") < Format( [Bdate], "mmdd") )
You can use that (adding >=18) as the Condition for control you want to change the background color for.
On another note, you would do this on a form, not a table. interaction with data should only be done thru forms. And you don't have fields on a form, you have controls that may or may not be bound to fields in a table. This is a subtle but important distinction.
Finally, you would use the Replace feature under the Edit menu. |