I was just working with adding them directly to to the controls collection of the ToolBarContainer.
But uisng this prevents the Layout from controling the toolbars last toolbarcontainer.
In this case, I have plug-ins dyanmically creating toolbars. On the first load of the plugin, it needs to add the toolbarcontainer directly. This allows it to be saved out to a layout file. But on non-first loads of the plug-in, I would need to register the toolbar, so the layout work correctly.
Have I got that part correct, or am I going at this worng?