D

Dispatch identifier (DISPID)

The number by which a member function, parameter, or data member of an object is known internally to the IDispatch interface.

dispinterface (dispatch interface)

An IDispatch interface that responds only to a certain fixed set of names. The properties and methods of the dispinterface are not in the virtual function table (VTBL) for the object.

dual interface

An interface that supports both IDispatch and VTBL binding.