| Microsoft DirectX 9.0 |
The SignalPresent method retrieves the strength of the signal on a given channel.
Syntax
HRESULT SignalPresent(
long *plSignalStrength
);
Parameters
plSignalStrength
[out] Pointer to a variable that receives a value indicating whether a signal is present on the current channel. Can be one of the following values.
| Value | Description |
| AMTUNER_HASNOSIGNALSTRENGTH | -1 |
| AMTUNER_NOSIGNAL | 0 |
| AMTUNER_SIGNALPRESENT | 1 |
A value of AMTUNER_HASNOSIGNALSTRENGTH means the signal strength cannot be determined at this time.
Return Values
Returns an HRESULT value.
See Also