IUnknown

E701323
COM interface Microsoft technology

IUnknown is the fundamental COM interface in Microsoft’s Component Object Model that provides object lifetime management and interface querying capabilities.

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Statements (56)

Predicate Object
instanceOf COM interface ⓘ
Microsoft technology ⓘ
definedBy Microsoft NERFINISHED ⓘ
definedIn Component Object Model NERFINISHED ⓘ
errorReporting QueryInterface returns HRESULT ⓘ
hasBinaryCompatibilityWith C++ virtual function tables ⓘ
hasCallingConvention stdcall ⓘ
hasGuid 00000000-0000-0000-C000-000000000046 ⓘ
hasHeaderDeclaration Unknwnbase.h ⓘ
unknwn.h ⓘ
hasMethod AddRef ⓘ
QueryInterface NERFINISHED ⓘ
Release ⓘ
hasMethodSignature QueryInterface(REFIID riid, void **ppvObject) ⓘ
ULONG AddRef(void) ⓘ
ULONG Release(void) ⓘ
introducedIn early 1990s ⓘ
isBaseInterfaceOf IAgileObject NERFINISHED ⓘ
IClassFactory NERFINISHED ⓘ
IDXGIObject NERFINISHED ⓘ
IDirect2DFactory NERFINISHED ⓘ
IDirect3DDevice9 NERFINISHED ⓘ
IDirectDraw NERFINISHED ⓘ
IDirectInput ⓘ
IDirectSound NERFINISHED ⓘ
IDispatch NERFINISHED ⓘ
IDispatchEx NERFINISHED ⓘ
IDropSource NERFINISHED ⓘ
IDropTarget NERFINISHED ⓘ
IInspectable NERFINISHED ⓘ
IMoniker NERFINISHED ⓘ
IOleObject ⓘ
IPersist ⓘ
IPersistFile NERFINISHED ⓘ
IPersistStream NERFINISHED ⓘ
IStream NERFINISHED ⓘ
Windows Runtime interfaces NERFINISHED ⓘ
isBinaryStandard true ⓘ
isFundamentalInterfaceFor all COM interfaces ⓘ
isLanguageNeutral true ⓘ
isReferenceCounted true ⓘ
lifetimeManagedBy AddRef and Release ⓘ
partOf COM NERFINISHED ⓘ
Microsoft Windows platform NERFINISHED ⓘ
providesCapability interface querying ⓘ
object lifetime management ⓘ
reference counting ⓘ
queryingMechanism QueryInterface returns pointers to supported interfaces ⓘ
usedFor .NET COM interop ⓘ
ActiveX controls NERFINISHED ⓘ
COM local servers ⓘ
COM+ components NERFINISHED ⓘ
binary interoperability ⓘ
in-process COM servers ⓘ
language-independent object interaction ⓘ
out-of-process COM servers ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Component Object Model → keyInterface → IUnknown ⓘ
Windows Script Components → supportsInterface → IUnknown ⓘ