Hi Steve,
I would recommend sticking with the BarManagers. In order to have the menu merged when opened inside, but still show up when opened outside, you''ll want to declare a BarManager, but then assign it an instance of either MainFrameBarManager or ChildFrameBarManager depending on which constructor is called.
You''ll want to create two separate constructors for your second Form. One for inside and one for outside. You''ll use an instance of ChildFrameBarManager for inside and MainFrameBarManager for outside.
I''ve included a sample to demonstrate this.
insideoutsidebarmanager_4900.zip
Regards,
Gregory Austin
Syncfusion, Inc.