A plug-in is custom business logic that you can integrate with Microsoft Dynamics CRM 4.0 to modify or augment the standard behavior of the platform.

The following sections describe how to add custom business logic to Microsoft Dynamics CRM 4.0 (on-premise) through the development and registration of plug-ins. These were known as callouts in Microsoft Dynamics CRM 3.0. For general information about the run-time execution of plug-ins and the plug-in development framework, see Event Framework.

Microsoft Dynamics CRM Online does not support plug-ins. However, you can extend the functionality by using workflows. For more information, see Workflows.

In this Section

Event Framework Overview

Describes the run-time architecture and programming model for asynchronous operations, bulk operations, and plug-ins.

Plug-in Development

Provides the detailed information about how to develop a plug-in.

Related Sections

Workflows

Describes how to create custom workflow components and workflow activities.

Plug-in Sample Code

Contains sample code that shows how to create plug-ins.