title	IAppHostMappingExtension Interface
description	Describes the IAppHostMappingExtension interface and details its syntax, methods, properties, remarks, inheritance hierarchy, and requirements.
ms.date	10/07/2016
ms.assetid	5ed0d0dd-8dfb-df88-a7a8-c0ec0e805f2c

IAppHostMappingExtension Interface

Extends the configuration system mapping functionality.

Syntax

IAppHostMappingExtension : public IUnknown

The following table lists the methods exposed by the IAppHostMappingExtension interface.

Method	Description
GetSiteElementFromSiteId	Gets a configuration element that represents a site by using the unique identifier for the site.
GetSiteIdFromSiteName	Gets a unique identifier for a site by using the name of the site.
GetSiteNameFromSiteId	Gets the name of a site by using the unique identifier for the site.
MapPath	Maps a site to a physical path, virtual directory, and application path by using the site name and virtual path.

This interface contains no properties.

Developers can extend the site-mapping functionality of IIS by implementing this interface to create a custom mapping extension.

IAppHostMappingExtension

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