If I implement CODECAPI_xxx properties mentioned here - http://msdn.microsoft.com/en-us/library/ff559558(v=VS.85).aspx, what is the best way to test this? I implemented ENCAPIPARAM props and graphedit showed them under filter properties. Is there a similar tool that will let me get/set codec api props? Or do I have to write a custom property page and look at it through graphedit?