No specific info about version 9.2. Please visit the main page of ArcGIS Desktop SDK for Visual C++ on Software Informer.
ArcGIS Explorer Desktop is a GIS viewer that gives you an easy way to explore.
ArcGIS Engine is a complete library of embeddable GIS components for developers.
It expands the geodatabase functionality of the ArcGIS Explorer Desktop app.
It adds projections and geotransformations for use with ArcGIS Explorer Desktop.
The ArcGIS API for Silverlight enables you to mapping and geocoding.
It is a plug-in that provides interoperability between AutoCAD and ArcGIS.