Programmatically determine which iFilters are installed

Question

I have a problem whereby the Adobe PDF iFilter doesn\'t work consistently for us. As such, we like to use the one from Foxit. The problem is, if we install the Foxit iFilter a

Answer 1

Since the foxit IFilter implements IPersistStream interface, I think you can try get this interface from the IFilter, and query for its CLSID to see if it is the one from foxit. Foxit IFilter has a CLSID of {987f8d1a-26e6-4554-b007-6b20e2680632}, which is the "Persistent Handlers Addins Registered" column in IFilter Explorer.

Adobe's IFilter doesn't seem to be implementing this interface.