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The GetSelection method gets the local ID of the part that is connected to the selector input that is currently selected.

HRESULT GetSelection(
  UINT  *pnIdSelected



[out] Pointer to a UINT variable into which the method writes the local ID of the part that directly links to the currently selected selector input.

Return Value

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.

Return code Description
E_POINTER 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.


Client: Windows Vista

Header: Include Devicetopology.h.

See Also

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