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# Notification Posting Options

Possible options when posting notifications.

## Discussion

Use these constants when calling the [`CFNotificationCenterPostNotificationWithOptions(_:_:_:_:_:)`](/documentation/CoreFoundation/CFNotificationCenterPostNotificationWithOptions(_:_:_:_:_:)) function.

## Topics

### Constants

[`var kCFNotificationDeliverImmediately: CFOptionFlags`](/documentation/CoreFoundation/kCFNotificationDeliverImmediately)

Delivers the notification immediately.

[`var kCFNotificationPostToAllSessions: CFOptionFlags`](/documentation/CoreFoundation/kCFNotificationPostToAllSessions)

Delivers the notification to all sessions.


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