Hi About the plp , we are use a private interface for get and set. // {FAA8F3E5-31D4-4e41-88EF-D9EB716F6EC9} #define STATIC_KSPROPSETID_BdaTunerExtensionProperties \ 0xfaa8f3e5, 0x31d4, 0x4e41, 0x88, 0xef, 0xd9, 0xeb, 0x71, 0x6f, 0x6e, 0xc9 DEFINE_GUIDSTRUCT("FAA8F3E5-31D4-4e41-88EF-D9EB716F6EC...