Hi Don,
Thanks for your confirmation and explanation. Just before the new product release we realize there is a need to plug in the old report support so we 'hope' we can just switch it on from the old VB6 to VB.NET migration project with all other codes built around the control.
If we need to wrap it with a C++ app then it may be better to use the newer viewer control with VS2010.
I bet it must have been answered 1000 times but if you can mention any compatibility concerns with the reports written in the old days with the newer viewer that will be awesome.
Thanks and appreciate your time on this 
-- Alex