1@ stdcall DrmAddContentHandlers(long ptr long) 2@ stdcall DrmCreateContentMixed(ptr long ptr) 3@ stdcall DrmDestroyContent(long) 4@ stdcall DrmForwardContentToDeviceObject(long ptr ptr) 5@ stdcall DrmForwardContentToFileObject(long ptr) 6@ stdcall DrmForwardContentToInterface(long ptr long) 7@ stdcall DrmGetContentRights(long ptr) 8