Each action item (TWebActionItem) performs a specific task in response to a given type of request message. 

Action items can completely respond to a request or perform part of the response and allow other action items to complete the job. Action items can send the HTTP response message for the request, or simply set up part of the response for other action items to complete. If a response is completed by the action items but not sent, the Web server application sends the response message. 

Set up action items for your Web server application by

• Adding actions to the dispatcher
• Determining when action items fire
• Responding to request messages with action items