---
UID: NE:eventsys.__MIDL_IEventObjectChange_0001
title: EOC_ChangeType (eventsys.h)
description: Indicates the nature of the change to an event object.
old-location: com\eoc_changetype.htm
tech.root: com
ms.assetid: 1dad5849-4c6c-4632-953c-1bb18f14e8c1
ms.date: 12/05/2018
ms.keywords: EOC_ChangeType, EOC_ChangeType enumeration [COM], EOC_DeletedObject, EOC_ModifiedObject, EOC_NewObject, _com_EOC_ChangeType, com.eoc_changetype, eventsys/EOC_ChangeType, eventsys/EOC_DeletedObject, eventsys/EOC_ModifiedObject, eventsys/EOC_NewObject
f1_keywords:
- eventsys/EOC_ChangeType
dev_langs:
- c++
req.header: eventsys.h
req.include-header: 
req.target-type: Windows
req.target-min-winverclnt: Windows 2000 Professional [desktop apps only]
req.target-min-winversvr: Windows 2000 Server [desktop apps only]
req.kmdf-ver: 
req.umdf-ver: 
req.ddi-compliance: 
req.unicode-ansi: 
req.idl: 
req.max-support: 
req.namespace: 
req.assembly: 
req.type-library: 
req.lib: 
req.dll: 
req.irql: 
topic_type:
- APIRef
- kbSyntax
api_type:
- HeaderDef
api_location:
- EventSys.h
api_name:
- EOC_ChangeType
targetos: Windows
req.typenames: EOC_ChangeType
req.redist: 
ms.custom: 19H1
---

# EOC_ChangeType enumeration


## -description


Indicates the nature of the change to an event object.


## -enum-fields




### -field EOC_NewObject

A new object was added.


### -field EOC_ModifiedObject

An existing object was modified.


### -field EOC_DeletedObject

An existing object was deleted.



## -see-also




<a href="https://docs.microsoft.com/windows/desktop/api/eventsys/nn-eventsys-ieventobjectchange">IEventObjectChange</a>
 

 

