No, all formulas return values. Once a formula is entered into a cell it will return a value 'til it has been eliminated.
Of course, in theory you could incorporate a "switch" in all your formulas that would cause it to return an empty string, "".
=IF(A1=something,"",[your formula here])
...but, I wouldn't recommend this.
This message was edited by Mark W. on 2002-10-17 18:18