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CComContainedObject Class

Visual Studio 2012

This class implements IUnknown by delegating to the owner object's IUnknown.

Important
This class and its members cannot be used in applications that execute in the Windows Runtime.

template< 
class Base  
> 
class CComContainedObject : 
public Base

Parameters

Base: Your class, derived from CComObjectRoot or CComObjectRootEx.

Members

Public Constructors

Name	Description
CComContainedObject::CComContainedObject	The constructor. Initializes the member pointer to the owner object's IUnknown.
CComContainedObject::~CComContainedObject	The destructor.

Public Methods

Name	Description
CComContainedObject::AddRef	Increments the reference count on the owner object.
CComContainedObject::GetControllingUnknown	Retrieves the owner object's IUnknown.
CComContainedObject::QueryInterface	Retrieves a pointer to the interface requested on the owner object.
CComContainedObject::Release	Decrements the reference count on the owner object.

Remarks

ATL uses CComContainedObject in classes CComAggObject, CComPolyObject, and CComCachedTearOffObject. CComContainedObject implements IUnknown by delegating to the owner object's IUnknown. (The owner is either the outer object of an aggregation, or the object for which a tear-off interface is being created.) CComContainedObject calls CComObjectRootEx's OuterQueryInterface, OuterAddRef, and OuterRelease, all inherited through Base.

Inheritance Hierarchy

Base

CComContainedObject

Requirements

Header: atlcom.h

Other Resources

ATL Class Overview

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