Conditionally Suppress Text Box Drop Shadow With Formula

[dazum]

I have a date formula in the Group Header of a report that shows if the date falls within the date parameters. I put the date within the text box and conditionally made the background of the textbox CrSilver if the date formula was not null. It worked by using the below formula:
If not isnull {@Date}
then
CrSilver
else
CrNoColor;
There is an "Drop Shadow" option for the textbox also, and I tried condtionally suppress the drop shadow with the same formula as above, but I get the error "The Formula Result Must Be A Boolean". Without somehow suppressing the Drop Shadow, it shows when {@Date} is null.
How can I suppress the Drop Shadow when {@Date} is null?
I am using CR 11.

 

[lbass]

You would conditionally SHOW the dropshadow, using a formula like this in the x+2 box next to the dropshadow option:

not isnull({@Date})

-LB

 

[dazum]

Thanks lbass!
I tried your suggestion and it's now giving me the Drop Shadow when I want it to show.