Hi Mark,
Thanks for the update.
You can have the same behavior with better appearance either by using OfficeSplitButton or OfficeDropDownButton.
Please take a look at the sample which is loaded locally in your Syncfusion Dashboard. Please refer the path as follows.
[Dahboard sample location path]
Open the Syncfusion Dashboard >> Windows Forms : Run Locally Installed Samples >> Tools samples >> Product Showcase >> Word 2007 Demo.
You can also assign context menus to the MenuButton if you wish to.
Please refer to the UG documentation under the following link
http://help.syncfusion.com/ug_84/User%20Interface/Windows%20Forms/Tools/Documents/menubuttondropdown.htmPlease let us know if you have any concerns on this or need any other details.
Regards,
Iniyen M.A.