We are currently trying to certify our product for Section 508 compliance.

This requires that all features can be accessed via the keyboard alone.

We currently have a ComboBoxTool on one of our toolbars - but NOT on a menu.

I can use Alt to navigate to/through the menus but I do not see any way to get the focus to a toolbar so that I can navigate to the ComboBox tool and use F4 to drop it down.

I can add it to a menu, but I dont want to do that if I can avoid it.
Then I can navigate to it using Alt followed by the arrow keys. Once I'm at the correct menu item Enter locks focus onto the ComboBox so that Up/Down arrows will scroll through the list entries, or F4 will drop down the list. 

Is there a way to get the focus to a ComboBoxTool on a toolbar?

(I tried the way Microsoft does it in Office - it does not work - strange since you seem to have duplicated everything else from the Office customizable toolbars.j)

Thanks
Mike