REGPINMEDIUM structure describes a pin medium for registration through the IFilterMapper2 interface.
GUID that specifies the medium.
Variable of type DWORD that specifies the instance of this medium. This is necessary when two identical devices are present on the host system.
A medium identifies a hardware path of communication that exists within a single hardware device or between two devices. Register mediums if your filter is built on kernel streaming pins and needs to connect to other such filters.
This structure is equivalent to the KSPIN_MEDIUM structure, which is used by kernel streaming drivers.