You will need to select Formula Is rather than Cell Value Is in the CF
dialogue, and use this formula:

=NOT(ISNA(MATCH($A56,'2006 All Clients'!$A$7:$A$4482,0)))

then choose the background colour you would like for this condition.
This assumes that cell A56 is the active cell when you click on the
Format | Conditional Formatting menu.

Hope this helps.

Pete

On Aug 24, 9:24*pm, Mary Lou
wrote:
i have a vlookup formula as follows:

=IF(ISNA(VLOOKUP($A56,'2006 Top
40'!$A$8:$B$470,2,FALSE)),IF(ISERROR(VLOOKUP($A56, '2006 All
Clients'!$A$7:$B$4482,2,FALSE)),"0",(VLOOKUP($A56, '2006 All
Clients'!$A$7:$B$4482,2,FALSE))),(VLOOKUP($A56,'20 06 Top
40'!$A$8:$B518,2,FALSE)))

Now - i would like to add conditional formatting so that if the result came
from the middle vlookup - the font color would be different - is this
possible?