Most of the properties of the TWebResponse object represent the header information of the HTTP response message that is sent back to the Web client. An action item sets these properties from its OnAction event handler. 

Not every response message needs to specify a value for every one of the header properties. The properties that should be set depend on the nature of the request and the status of the response. 

Use the response object properties for

• Indicating the response status
• Indicating the need for client action
• Describing the server application
• Describing the content