IPortTopology interface

The IPortTopology interface provides generic port driver support to a topology miniport driver. The PortCls system driver implements this interface and exposes it to the adapter driver that implements the IMiniportTopology object. An adapter driver creates an IPortTopology object by calling PcNewPort and specifying REFIID IID_IPortTopology. IPortTopology inherits from the IPort interface.

An adapter driver forms a miniport/port driver pair by binding an IMiniportTopology object to an IPortTopology object. The PortCls system driver registers this pair with the system as a topology filter.

The IPortTopology interface supports only the methods that it inherits from the IPort interface.


The IPortTopology interface inherits from the IPort interface.


The IPortTopology interface has these methods.

Method Description


Target Platform Windows
Header portcls.h