The GetLocalId method gets the local ID of this part.
HRESULT GetLocalId( UINT *pnId );
[out] Pointer to a UINT variable into which the method writes the local ID of this part.
If the method succeeds, it returns S_OK. If it fails, possible return codes include, but are not limited to, the values shown in the following table.
|E_POINTER||Pointer pnId is NULL.|
When you have a pointer to a part object, you can call this method to get the local ID of the part. A local ID is a number that uniquely identifies a part among all parts in a device topology.
The IAudioInputSelector::GetSelection and IAudioOutputSelector::GetSelection methods retrieve the local ID of a connected part. The IAudioInputSelector::SetSelection and IAudioOutputSelector::SetSelection methods select the input or output that is connected to a part that is identified by its local ID. The IDeviceTopology::GetPartById method gets a part that is identified by its local ID.
For code examples that use the GetLocalId method, see the following topics:
Client: Windows Vista
Header: Include Devicetopology.h.
- IPart Interface