I have some DTE-related work I need to do in my VSIP project that is going
to be much easier to implement from managed code instead of unmanaged C++.
How do I pass the DTE interface pointer from my unmanaged code into a
managed assembly?  I implemented a managed C++ dll that exports a function
my unmanaged code calls to pass in the DTE interface pointer as an unmanaged
void*.  I haven't been able to figure out how to box the interface pointer
back into a managed DTE object?  I tried using
System.Reflection.Pointer.Box(pv, type) to box the pointer, but it gives me
an argument-exception because the type refers to an interface and not a
pointer.

Is there an easier way for managed code to get at the DTE interface?  I
tried using GetActiveObject, which works just fine as long as there is only
one instance of VS.NET running.  If there are multiple instances running
then it is possible that the wrong DTE interface will be returned.  From
what I see in the documentation, the only way to get at the DTE interface
(or any other interface) is to either be derived from IServiceContainer or
have been given an IServiceProvider interface, neither of which is true for
my simple managed dll.