>Should we make conclusion that to Register a DLL, Build from VFP6.0, Requires a perticular DLL of VFP 6.0 to be registered first and then we can register our DLL ? Which VFP 6.0 DLL(s) is mandatory for this ?

THese two VFP6RENU.dll and VFP6R.dll for COM DLLs, for Win32 EXEs you need alot more though/