A: 

Could you do something simple like this article shows?:

http://www.xhydra.com/dotnet/displaying-checkboxes-in-microsoft-reports.html

Cory Larson
Cory,That's an interesting solution, but I'm reluctant to use WingDings in a web application. I guess I could use IIf to control the visibility of an checkbox image instead. All of this seems like a hack though.
VanOrman
Controlling the visibility of a checkbox image was the other workaround I found but this one was simpler. Apparently (though I haven't had experience with it) there's some extra crap you need to configure in your report to account for external images.
Cory Larson
The link in the answer is dead...
jbandi
So you down-voted it 7 months later? It solved the problem the asker had, no need to bash.
Cory Larson
Sorry this was not personal. But the answer is worth nothing today... the question is if the votes should represent the current value or if they should be a historical documentation...
jbandi
Point taken. Maybe it will come back up someday :)
Cory Larson
A: 

Since the xhydra link in the other answer is dead, I'm going to add this answer suggested here by user nyashaC.

= iif( Fields!absent.Value , Chr(254), Chr(168))

AND THEN change the font to wingdings for that particular display field (NOT FOR THE WHOLE REPORT!!!)

hawbsl