IUnregisterPhysicalConnection::UnregisterPhysicalConnection method (portcls.h)

The UnregisterPhysicalConnection method deletes the registration of a physical connection that was registered by a previous call to PcRegisterPhysicalConnection.

Syntax

NTSTATUS UnregisterPhysicalConnection(
  [in] PDEVICE_OBJECT DeviceObject,
  [in] PUNKNOWN       FromUnknown,
  [in] ULONG          FromPin,
  [in] PUNKNOWN       ToUnknown,
  [in] ULONG          ToPin
);

Parameters

[in] DeviceObject

Pointer to the device object for the adapter device. This parameter must point to a system structure of type DEVICE_OBJECT.

[in] FromUnknown

Pointer to the IPort interface of a port driver object. The port driver object that is associated with FromUnknown is bound to the subdevice that supplies the connection's data source pin.

[in] FromPin

Specifies a pin ID. This parameter identifies the data source (output) pin on the filter that is associated with the FromUnknown interface.

[in] ToUnknown

Pointer to the IPort interface of a port driver object. The port driver object that is associated with ToUnknown is bound to the subdevice that supplies the connection's data sink pin.

[in] ToPin

Specifies a pin ID. This parameter identifies the data sink (input) pin on the filter that is associated with the ToUnknown interface.

Return value

UnregisterPhysicalConnection returns STATUS_SUCCESS if the call was successful. Otherwise, it returns an appropriate error code.

Remarks

For more information, see Dynamic Audio Subdevices.

Requirements

See also

DEVICE_OBJECT

IPort

IUnregisterPhysicalConnection

PcRegisterPhysicalConnection