iapphostpropertyschema-isuniquekey-property.md

title	IAppHostPropertySchema::IsUniqueKey Property
description	Learn how the IsUniqueKey property determines whether a property value is a unique key for a collection.
ms.date	10/07/2016
ms.assetid	8ab3c522-03ae-4d2f-daf4-e82086b6c1a2

IAppHostPropertySchema::IsUniqueKey Property

Determines whether a property value is a unique key for a collection.

Syntax

HRESULT get_IsUniqueKey(  
   [out,  
   retval] VARIANT_BOOL* pfIsUniqueKey  
);  

Parameters

pfIsUniqueKey
A pointer to a VARIANT_BOOL. VARIANT_TRUE if a property value is a unique key for a collection; otherwise, VARIANT_FALSE. The default is VARIANT_FALSE.

Return Value

An HRESULT. Possible values include, but are not limited to, those in the following table.

Value	Description
S_OK	Indicates that the operation was successful.

Requirements

Type	Description
Client	- IIS 7.0 on [!INCLUDEwinvista] - IIS 7.5 on Windows 7 - IIS 8.0 on Windows 8 - IIS 10.0 on Windows 10
Server	- IIS 7.0 on [!INCLUDEwinsrv2008] - IIS 7.5 on Windows Server 2008 R2 - IIS 8.0 on Windows Server 2012 - IIS 8.5 on Windows Server 2012 R2 - IIS 10.0 on Windows Server 2016
Product	- IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0 - [!INCLUDEiisexp75], [!INCLUDEiisexp80], [!INCLUDEiisexp100]
Header	Ahadmin.h

See Also

IAppHostPropertySchema Interface
IAppHostPropertySchema::IsCombinedKey Property