IUnknown

[Properties (by Name)][Methods (by Name)][Events (by Name)]

Basic interface for all COM-based interfaces

Declaration

Source position: objpash.inc line 261

Type
  IUnknown = interface ['{00000000-0000-0000-C000-000000000046}']
    function QueryInterface(const iid: TGuid; out obj) : LongInt;
    function _AddRef : LongInt;
    function _Release : LongInt;
  end
  ;

Description

IUnknown is defined by windows. It's the basic interface which all COM objects must implement. The definition does not contain any code.

Members

Member	Type	Visibility	Description
QueryInterface	Method	default	Return pointer to VMT table of interface
_AddRef	Method	default	Increase reference count of the interface
_Release	Method	default	Decrease reference count of the interface

Inheritance

Class	Description
IUnknown	Basic interface for all COM-based interfaces

See also

Name	Description
IDispatch	Dispatch interface
IInterface	Basic interface for all COM based interfaces
IInvokable	Interface with RTTI associated with it.