Interface IUnknown

Enables clients to get pointers to other interfaces on a given object through the QueryInterface method, and manage the existence of the object through the AddRef and Release methods. All other 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.

Namespace: Dapplo.Windows.Com
Assembly: Dapplo.Windows.Com.dll
Syntax
public interface IUnknown

Methods

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AddRef()

Increments the reference count for an interface on an object.

Declaration
uint AddRef()
Returns
Type Description
System.UInt32

uint
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QueryInterface(ref Guid)

Retrieves pointers to the supported interfaces on an object.

Declaration
IntPtr QueryInterface(ref Guid riid)
Parameters
Type Name Description
Guid riid
Returns
Type Description
IntPtr

IntPtr
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Release()

Decrements the reference count for an interface on an object.

Declaration
uint Release()
Returns
Type Description
System.UInt32

uint