G = F + IDispatch (allowing script clients including VBS, C# dynamic, Java and FPC)

**** .idl ****

interface IXxxx : IDispatch

library XxxxLibrary
    coclass CoXxxx

**** .h ****

class CoXxxx : ITest
// IUnknown methods
// IDispatch methods
// IXxxx methods

class CoXxxxFactory : IClassFactory
// IUnknown methods
// IClassFactory methods

**** registry ****

name -> co class GUID
co class GUID -> name
co class GUID -> DLL
co class GUID -> library GUID

auto via DllRegisterServer and DllUnegisterServer in DLL

**** C++ usage ****

import tlb

IXxxxPtr p
IXxxxPtr.CreateInstance()

or:

IXxxxPtr p()

**** C# usage ****

CoXxxx co = new CoXxxxClass()
IXxxx o = (IXxxx)co

**** dynamic C# usage ****

dynamic o = Activator.CreateInstance()

**** VBS usage ****

Set o = CreateObject()