CLSID_VIO_ODOMETER

This CLSID returns an odometer reading.

Name

Odometer

Access

Read, shareable or exclusive

Range

Type:	VT_UI4 (unsigned long)
Low:	0
High:	16,777,216 (2^24)

Input

None

Output

Type:	VT_UI4 (unsigned long)
Measurement:	VIOMEASUREMENT_DISTANCE
Units:	VIOUNITS_KILOMETERS

Remarks

This CLSID should be used for taking readings between two points in time. Do not assume it returns total mileage on the vehicle.

API device objects expect the following data types and sizes when sending data to and from the mini-drivers:

Mini-driver input

None

Mini-driver output

Type:	ULONG *
Size:	4 bytes
Description:	Odometer reading in 1 kilometer increments

Example

HRESULT hr;
IVIO_Device *pOdometer;
//Create an event sink object; iOdometerSink is derived from //IVIO_EventSink.
IVIO_EventSink *iOdometerSink = new COdometerSink;
//Create an instance of the odometer device and get its 
//IVIO_Device interface.
hr = CoCreateInstance(CLSID_VIO_ODOMETER, NULL,
                     CLSCTX_INPROC_SERVER, IID_VIODEVICE,
                     &pOdometer);
//Set the notification sink to notify every five seconds.
pOdometer->SetNotify(NULL, iOdometerSink, 5000);
. . .
//Remove the notification sink.
pOdometer->SetNotify(NULL, NULL, 0);
//Release the reference to the interface.
pOdometer->Release();
//Release the event sink object.
iOdometerSink->Release();