This enumerator enumerates objects with the IUnknown interface. It can be used to enumerate through the objects in a component containing multiple objects. IEnumUnknown has the same methods as all enumerator interfaces: Next, Skip, Reset, and Clone. For general information on these methods, refer to IEnumXXXX.
You can implement this whenever you want a caller to be able to enumerate the objects contained in another object. You get a pointer to IEnumUnknown through a call to IOleContainer::EnumObjects.
Call the methods of IEnumUnknown to enumerate the objects in a compound document, when you get a pointer to the interface on the enumerator through a call to IOleContainer::EnumObjects.
The prototypes of the methods are as follows:
HRESULT Next(ULONG celt, IUnknown ** rgelt, ULONG * pceltFetched)
HRESULT Skip(ULONG celt)
HRESULT Reset(void)
HRESULT Clone(IEnumUnknown ** ppenum)
See Also