If yourRegion above is a text field, then you will have to surround it with single quotes; ie:
[tt]
DCount("[Field]","TableName","[Region]=[red]'[/red]" & yourRegion[red] & "'"[/red])
[tt]
Steve Lewy
Solutions Developer
steve@lewycomputing.com.au
(dont cut corners or you'll go round in circles)