---
title: "Connecting to a Data Source or Driver | Microsoft Docs"
ms.custom: ""
ms.date: "01/19/2017"
ms.prod: sql
ms.prod_service: connectivity
ms.reviewer: ""
ms.technology: connectivity
ms.topic: conceptual
ms.assetid: e93027ab-9e60-47b7-ba96-8289dae32a22
author: David-Engel
ms.author: v-daenge
---
# Connecting to a Data Source or Driver
An application can be connected to any number of drivers and data sources. These can be a variety of drivers and data sources, the same driver and a variety of data sources, or even multiple connections to the same driver and data source.  
  
 This section contains the following topics.  
  
-   [Allocating the Environment Handle](../../../odbc/reference/develop-app/allocating-the-environment-handle.md)  
  
-   [Declaring the Application's ODBC Version](../../../odbc/reference/develop-app/declaring-the-application-s-odbc-version.md)  
  
-   [Choosing a Data Source or Driver](../../../odbc/reference/develop-app/choosing-a-data-source-or-driver.md)  
  
-   [Allocating a Connection Handle](../../../odbc/reference/develop-app/allocating-a-connection-handle-odbc.md)  
  
-   [Connection Attributes](../../../odbc/reference/develop-app/connection-attributes.md)  
  
-   [Establishing a Connection](../../../odbc/reference/develop-app/establishing-a-connection.md)  
  
-   [Driver Manager Connection Pooling](../../../odbc/reference/develop-app/driver-manager-connection-pooling.md)  
  
-   [Disconnecting from a Data Source or Driver](../../../odbc/reference/develop-app/disconnecting-from-a-data-source-or-driver.md)  
  
-   [The Driver Manager's Role in the Connection Process](../../../odbc/reference/develop-app/driver-manager-s-role-in-the-connection-process.md)