Clients use the properties in the KSPROPSETID_Connection property set to examine or set the state of a connection on a pin. Pin instances handle these properties.
Stream class minidrivers do not have to handle KSPROPERTY_CONNECTION_STATE or KSPROPERTY_CONNECTION_PROPOSEDATAFORMAT properties directly. The stream class driver handles them, using stream request blocks (SRB) to query for more information where necessary.
The KSPROPSETID_Connection property set includes: