How to allow multiple RadToolBarButton's to be checked/selected/highlighted at once

Hi,

I have a diagramming application which uses a RadToolBar to set attributes such as Bold, Italic and Underline - pretty standard stuff.

The RadToolBarButton's need to serve a dual purpose:

1. To set the attribute (e.g., Bold) of the selected object
2. To indicate the attribute setting for the selected object

I am using the check() method of the item to "highlight" it if the selected shape has that attribute set.

Unfortunately it seems that only 1 item can be checked at a time.

How do I go about checking/selecting/highlighting multiple toolbarbutton's?

Thanks in advance for any suggestion and code snippets.

Jim