How are Visual Basic 6.0 Native Libraries (VB, VBA, VBRUN) migrated by the upgrade wizard?
The Visual Basic 6.0 native libraries — which provide much of the language’s core functionality — have been replaced by the .NET Framework itself. The .NET Framework provides the .NET languages with core functionality through the System namespace and other namespaces. The upgrade wizard automatically replaces calls to the Visual Basic 6.0 native libraries with calls to the equivalent .NET Framework objects and classes.