The ISAXXMLFilter/IVBSAXXMLFilter interface provides a convenient base for creating an XML filter by passing on all ISAXEntityResolver/IVBSAXEntityResolver, ISAXDTDHandler/IVBSAXDTDHandler, ISAXContentHandler/IVBSAXContentHandler, and ISAXErrorHandler/IVBSAXErrorHandler events automatically. An XML filter is like an XML reader, except that it obtains its events from another XML reader rather than a primary source, such as an XML document or a database. Filters can modify a stream of events as they pass on to their final application.
The IVBSAXXMLFilter interface is derived from the IDispatch interface, not the IVBSAXXMLReader interface.
Sets or gets the instance of the reader that is the parent of the IVBSAXXMLFilter.