IUnknown

[This is preliminary documentation and subject to change.]

The IUnknown interface lets clients get pointers to other interfaces on a given object through the IUnknown::QueryInterface method, and manage the existence of the object through the IUnknown::AddRef and IUnknown::Release methods. All other Component Object Model (COM) interfaces are inherited, directly or indirectly, from IUnknown. Therefore, the three methods in IUnknown are the first entries in the vtable for every interface.

Note This interface and its methods are fully documented in the COM documentation in the Microsoft® Platform SDK and are only partially documented here for quick reference.

Methods in Vtable Order