Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

This method is called repeatedly by the framework to process the next chunk of input. The implementation should parse a suitable (preferably not too large) chunk of the input, and return a boolean value that indicates whether there is more work to be done before this file is completely parsed.

The framework will set this property as part of initialization of the file type component. File type components use this interface to report any non-critical issues to the framework. (Critical issues are reported by throwing a FileTypeSupportException or a derived type.)

The framework sets this property before the first call to ParseNext in order to specify the component that will process the output from the parser. The parser implementation should send the whole output to this object.

The framework will set this property as part of the initialization of the file type component. File type components should use this factory to create the property objects that are used when outputting to the INativeExtractionContentHandler.

The parser fires this event at regular intervals in order to report the progress so that interested parties can ascertain whether the parsing process is indeed in progress and has not hung. That way users get an idea about how fast the parsing job is progressing. Framework consumers should typically not connect directly to this event, but rather connect to the corresponding event on the IFileConverter instance.