IEnumUnknown (Windows Embedded CE 6.0)
1/6/2010
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.
When to Implement
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.
When to Implement
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.
Methods
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
);
Remarks
To determine whether the platform supports this interface, see Determining Supported COM APIs.
Requirements
| Header | objidl.h, objidl.idl |
| Library | ole32.lib, uuid.lib |
| Windows Embedded CE | Windows CE 3.0 and later |