Hi Jim,
unfortunately, the C++ language service does not add the doc comments to the object browser as the C# does. The object browser calls into the language service's implementation of IVsSimpleObjectList2::FillDescription2 where the language service (vcpkg.dll) adds
the text to the richtextbox of the object browser pane.
The doc setting for C++ is set in the project properties dialog (right click on the project node in solution explorer), expand the configuration properties | C/C++ node, all options | Generate XML Documentation Files, set to Yes.
Please submit the feature request via the uservoice link to see if the product group can add this in
http://visualstudio.uservoice.com/forums/121579-visual-studio
much appreciated,
mike