const GUID KSPROPSETID_Pin = {0x8C134960L, 0x51AD, 0x11CF, {0x87, 0x8A, 0x94, 0xF8, 0x01, 0xC1, 0x00, 0x00}};
const GUID KSPROPSETID_Connection = {0x1D58C920L, 0xAC9B, 0x11CF, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
const GUID KSPROPTYPESETID_General = {0x97E99BA0L, 0xBDEA, 0x11CF, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
+const GUID KSPROPSETID_DrmAudioStream = {0x2f2c8ddd, 0x4198, 0x4fac, {0xba, 0x29, 0x61, 0xbb, 0x05, 0xb7, 0xde, 0x06}};
const GUID KSEVENTSETID_LoopedStreaming = {0x4682B940L, 0xC6EF, 0x11D0, {0x96, 0xD8, 0x00, 0xAA, 0x00, 0x51, 0xE5, 0x1D}};
const GUID KSEVENTSETID_Connection = {0x7f4bcbe0L, 0x9ea5, 0x11cf, {0xa5, 0xd6, 0x28, 0xdb, 0x04, 0xc1, 0x00, 0x00}};