Is there an easy way to determine which is the topmost tabbed document?
Using DTE.ActiveDocument gives me the topmost document (edit buffer), but
won't work when another toolWindow is in Tabbed Document state sitting on
top of the ActiveDocument.  In essence, I'd like to know when all
documents/edit bufferes are covered up by a toolwindow that is also tabbed.
I've been getting around this by watching the events from
IVsSelectionEvents.  However, so many events are fired when switching
between tabs and other windows in the IDE, that I occasionally catch the
VSConstants.VSSELELEMID.SEID_WindowFrame event when I don't want to.

I know the places when I might need to do the update for which I have been
using IVsSelectionEvents.  So if I could just read the text on the tab of
the topmost tabbed document (toolwindow or otherwise), I could handle my
updates more easily than checking through the IVsSelectionEvents.

One more related question:

In IVsSelectionEvents:OnElementValueChanged(uint elementid, object
varValueOld, object varValueNew), when elementid is SEID_WindowFrame, what
kind of old do varValueOld and varValueNew reference.  The documentation
mentions that they will be IOleCommandTargets when elementid is
SEID_ResultsList etc.  But documents don't say what they will be for
SEID_WindowFram.  I tried to cast to IOleWindow, but it did not work.

Thanks,

-DOB-