This is all managed code, and wanting to avoid COM.  I would think perhaps
something like...

#using "PPSLibNET.dll" // VB DLL
using namespace ODP::PPS::PPSLib

Note: the objects of both DLLs are in the same namespace. The classes of VB
DLL simply are not seen either in intellisense, or compilation.

Is it even possible to do?

TIA - Best regards, Lee Gillie

The answer was found to be that the VB dll could not be in the same
namespace as the VC++ dll.  I tweaked the VB project namespace, and then the
C++ compilation would work (but not intellisense) which is good enough.
Thanks to those who may have taken time to puzzle on this.

Best regards - Lee