Using MDI tab groups and dragging tabs to a new tab group

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C++

MFC

MDI

I'm moving an old 1990's MDI program to the next century. I've spent many hours searching and experimenting to achieve one feature I'd like to have.

I know MDI with Tabs, specifically Tab Groups, is the way to go - just like Visual Studio. The links here https://www.codeproject.com/Answers/986898/question-about-mdi-child1 are great, as is the MS MDITabsDemo in the 2008 or 2010 Demo paks.

It all works great for me. My simple question is, how do you move a tab to the desktop and have it create a new Tab Group - just like Visual studio does? I can drag tabs in the MDITabsDemo but I do not get the 5 icons for where to drop the new pane.

In that same demo program the MDI Tabs Options pane can be dragged and the 5 location icons appear. It's like the CChildFrame for the MDI Child doesn't do this.

Thank you for your suggestions, or links to achieve this that I must have missed.

Bill

What I have tried:

In the MDITabsDemo:

1. EnableDocking( CBRS_ALIGN_ANY | CBRS_FLOAT_MULTI ) in the CChildFrame OnCreate as well as the OnCreate for the CMainFrame.

2. Although MDITabsDemo dynamically sets most of the EnableMDITabbedGroups I tried some other variants.