---
title: "Installer DLL | Microsoft Docs"
ms.custom: ""
ms.date: "01/19/2017"
ms.prod: sql
ms.prod_service: connectivity
ms.reviewer: ""
ms.technology: connectivity
ms.topic: conceptual
helpviewer_keywords: 
  - "installing ODBC components [ODBC], installer DLL functions"
  - "installer DLL [ODBC]"
ms.assetid: e2b92afb-64ce-4ce0-84ad-6a4276646e68
author: David-Engel
ms.author: v-daenge
---
# Installer DLL
> [!NOTE]  
>  Starting with Windows XP and Windows Server 2003, ODBC is included in the Windows operation system. You should only explicitly install ODBC on earlier versions of Windows.  
  
 The installer DLL contains functions to install and remove ODBC components, maintain registry information about those components, and maintain registry information about data sources. It is written by Microsoft and can be redistributed. For a complete description of the functions in the installer DLL, see [Installer DLL API Reference](../../../odbc/reference/syntax/installer-dll-api-reference-function.md).  
  
## See Also  
 [Registry Entries for ODBC Components](../../../odbc/reference/install/registry-entries-for-odbc-components.md)   
 [Registry Entries for Data Sources](../../../odbc/reference/install/registry-entries-for-data-sources.md)