I've read over this forum post which has a potential solution for RadSplitButton, but I am struggling to apply this to a CommandBarSplitButton.  

Basically the behavior I need is:
-when any menu item in the split button is clicked, that item should become the default item AND the button should show a highlighted state like IsMouseOver = true
-when the action button is clicked while it is highlighted, it should un-highlight.  (Other "cancel" conditions can cause this as well)

I have tried setting IsMouseOver = true on about every element I could find in the hierarchy.  I'd prefer not to have to create a custom theme or change the background colors manually if possible.

We're using Q2 2011 SP1 on our way to Q3 2011.

Thanks,
Adam

Hello Adam,

Thank you for writing.

If I understand correctly, you want to change only the appearance of the button when item is selected and when the action button is clicked. If so, please refer to the attached application, which demonstrates how to achieve the desired appearance. This approach is valid for both Q2 2011 SP 1 and Q3 2011 SP 1.

A bit off topic, I would like to remind you that your subscription package has expired, which means that you are not entitled to support services. I would highly recommend upgrading your license to the latest version in order to continue getting product updates and uninterrupted support services. Please contact sales@telerik.com or visit your account for your upgrading options. 

I hope that you find this information helpful.

Regards,
Stefan
the Telerik team

Stefan,

Thanks for the reminder, we're going to be getting our support up to date (today if I can believe my boss!).

As for your solution, it wasn't quite what I needed but I think I do have a way to do what I was trying to do:

-DefaultItemChanged won't work because I need the actionButton click to also toggle the highlighting
-using the menuItem_click won't quite work because by definition the mouse is over the button when clicking on it and leaving the button will trigger the IsMouseOver = false automatically

To solve this, I use the Tag property to store the toggle state.  By subscribing to the mouseLeave event I can check the toggle state and reset IsMouseOver = true;

Stefan,

Thanks for the approach, looks like that is the way to go.   I appreciate the help, you guys rock!

-Adam

Hello Adam,

I am glad that I could help. If you have any other questions, do not hesitate to contact us.
 
Greetings,
Stefan
the Telerik team