ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Desktop.Framework.Utilities Namespace / Broadcast Class
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    Broadcast Class
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    Class used for communicating between multiple instances of Pro using a publish/subscribe model. Messages are organized around a uniquely named channel. Subscribers can limit what messages they receive by subscribing to a specific channel. Publishers specify a channel when posting messages. Calling publish when fewer than two instances of Pro are running will produce no messages.
    Syntax
    public static class Broadcast 
    Public MustInherit NotInheritable Class Broadcast 
    Inheritance Hierarchy

    System.Object
       ArcGIS.Desktop.Framework.Utilities.Broadcast

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also