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# getCustomParameterValue(_:fromParameter:at:)

Retrieves the (possibly keyframed) value of a custom parameter at a given time.

```
func getCustomParameterValue(_ value: AutoreleasingUnsafeMutablePointer<(any NSCopying & NSSecureCoding & NSObjectProtocol)?>, fromParameter parameterID: UInt32, at time: CMTime) -> Bool
```

## Parameters

`value`

Receives the value of the parameter at the given time.

`parameterID`

Unique identifier for the parameter.

`time`

Specified time to get the value.

## Return Value

Returns `YES` if the value is retrieved successfully; `NO` otherwise.

## Discussion

Depending on the host application, the time value may be relative to the start of the timeline or to the start of the clip. See [Understanding time in FxPlug](/documentation/Professional-Video-Applications/understanding-time-in-fxplug).

---

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