|Microsoft DirectX 9.0|
The get_SignalQuality method retrieves a value from 1 to 100 indicating the quality of the signal.
HRESULT get_SignalQuality( LONG* plPercentQuality );
[out] Pointer that receives the value as a percentage. 100 indicates best quality and 0 indicates worst quality.
If the method succeeds, it returns S_OK. If it fails, it returns an error code.