Custom HTTP Header definition for IIS resources such as WebSite and WebVirtualDir. Extensibility point in the WiX XML Schema. Schema extensions can register additional elements at this point in the schema. Primary key for custom HTTP Header entry. This will default to the Name attribute. Name of the custom HTTP Header. Value for the custom HTTP Header. This attribute can contain a formatted string that is processed at install time to insert the values of properties using [PropertyName] syntax. Also supported are environment variables, file installation paths, and component installation directories; see Formatted for details. Extensibility point in the WiX XML Schema. Schema extensions can register additional attributes at this point in the schema.