Hello, I'd like to write a Thumbnail Shell Extension for non standard TIFF-formats. The implementation stuff seems to be possible with ShellExt and a COM-Object. However, the handler is never called because TIFF has a built-in default handler. So my question: a) Is it possible to subclass the default handler (Hook etc) b) Is it possible to replace the default handler (Registry, PersistentHandler???...) Additional Question: Do customers appreciate replaced default handlers? Is it good style? What if they uninstall my software... ;-( Regards BD
