Porting and Upgrading Programs
Porting an application refers to opening it for the first time in Visual C++. Upgrading refers to opening a project from a previous version of Visual C++ in the current version.
For more information, see What's New in Visual C++ 2008.
An ActiveX control compiled with Visual C++ 6.0 when embedded in a dialog box in a project developed with Visual C++ 2008 may cause your program to assert at runtime. In this situation, recompile the ActiveX control using Visual C++ 2008. The assert will be in the file occcont.cpp, on the line in source: ASSERT(IsWindow(pTemp->m_hWnd)).