The GetSelection method gets the local ID of the part that is connected to the selector output that is currently selected.
HRESULT GetSelection( UINT *pnIdSelected );
Pointer to a UINT variable into which the method writes the local ID of the part that has a direct link to the currently selected selector output.
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.
||Pointer pnIdSelected is NULL.|
A local ID is a number that uniquely identifies a part among all parts in a device topology. To obtain a pointer to the IPart interface of a part from its local ID, call the IDeviceTopology::GetPartById method.
|Minimum supported client||Windows Vista [desktop apps only]|
|Minimum supported server||Windows Server 2008 [desktop apps only]|