title: Advanced Windows Application UI (MDI Tabbed Group)
body: <p>I would like to be able to create an MDI UI layout that extends the behavior of <a href="http://msdn.microsoft.com/en-us/library/cc165830.aspx" rel="nofollow noreferrer">MDI Tabbed Groups</a> in the following way.  Within a pane for a split tabbed group, I'd like to create a nested tab group with the opposite directional alignment.  For instance, given a horizontally split top level, I would like to create a vertically split tab group within the first pane.  This appears to necessitate a rework of the CMDIFrameWndEx and associated classes.</p>
  
  <p>The Tabbed Group Layout is an appealing UI device.  It's a shame it's not available in mainstream web browsers.  Am I right in assuming that its best support is in the Visual  C++ Feature Pack?</p>