Can we use our own TabControl inside TabbedMdiHost?

Hello,

A third-party TabControl won't work within TabbedMdiContainer since it expects a control that inherits our AdvancedTabControl, which in turn inherits TabControl.

Our default TabbedMdiContainer template uses a TabbedMdiContainerTabControl instance in it, which inherits AdvancedTabControl.  You can swap in any custom control that inherits TabbedMdiContainerTabControl if you override the default template for TabbedMdiContainer.  The default styles/templates are available to WPF Studio customers, downloadable from their account.  The default style/template for TabbedMdiContainer can be overridden in your app's Resources.

Or if you don't need to alter the controls themselves and just want a different style/template for the TabControl, you can set the TabbedMdiHost.TabControlStyle property.  That Style will flow down and apply to all the tab controls used in the TabbedMdiContainers.