Try:
Expression [MyField] Is Null
replacing "MyField" with the name of your control.

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"jmuirman" wrote in message
...
I want to have a field in a report become red if the field is blank. I
can't
seem to use conditional formatting for this.

Thanks,

John