|Microsoft DirectX 9.0|
The get_ExternalDeviceID method retrieves the model number of the external device.
HRESULT get_ExternalDeviceID( LPOLESTR *ppszData );
[out] Pointer to an LPOLESTR that receives the manufacturer-specific identification as a string. The caller must release the string by calling CoTaskMemFree.
When this method succeeds, it returns S_OK. Otherwise it returns an HRESULT error code.
MSDV returns the device's 64-bit unique identifier, as defined by IEEE 1394. This identifier is guaranteed to be unique, even for two identical device models connected simultaneously to the IEEE 1394 bus.