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# startParameterSubGroup(_:parameterID:parameterFlags:)

Starts a new parameter subgroup. All subsequent parameter additions are placed in this group until you send an [`endParameterSubGroup()`](/documentation/professional_video_applications/FxParameterCreationAPI_v5/endParameterSubGroup()) message.

```
func startParameterSubGroup(_ name: String, parameterID: UInt32, parameterFlags flags: FxParameterFlags) -> Bool
```

## Parameters

`name`

Name of the parameter in the user interface.

`parameterID`

Unique identifier for a parameter. Used to retrieve, set, or validate the parameter.

`flags`

Flags that encode various state values for the parameter.

## Return Value

Returns `YES` if the application successfully creates a parameter sub group; `NO` otherwise.

---

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