Windows.Win32.System.Com.IUnknown

struct IUnknown : IComIID

Documentation
Code

public uint AddRef()

Increments the reference count for an interface pointer to a COM object. You should call this method whenever you make a copy of an interface pointer.

public HRESULT QueryInterface(Guid* riid, Void** ppvObject)

public uint Release()

Decrements the reference count for an interface on a COM object.