---
title: usesDataSource
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nscomboboxcell/usesdatasource
---

# usesDataSource

A Boolean value that indicates if the combo box uses an external data source to populate its pop-up list.

## Declaration

```swift
var usesDataSource: Bool { get set }
```

## Discussion

Discussion When the value of this property is true, the combo box uses an external data source to populate its pop-up list; when it is false, the combo box uses an internal item list.

## See Also

### Accessing a Data Source

- [dataSource](appkit/nscomboboxcell/datasource.md)