ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Framework.Events Namespace / ActiveToolChangedEvent Class / Subscribe Method
The method to call.
Subscribe with a strong reference. Default is false (weak reference).
Example Version

Subscribe Method (ActiveToolChangedEvent)
Call the specified method whenever the event occurs.
Syntax

Parameters

action
The method to call.
keepSubscriberAlive
Subscribe with a strong reference. Default is false (weak reference).

Return Value

A SubscriptionToken that can be used to unsubscribe with.
Example
Subscribe to Active Tool Changed Event
private void SubscribeEvent()
{
  ArcGIS.Desktop.Framework.Events.ActiveToolChangedEvent.Subscribe(OnActiveToolChanged);
}
private void UnSubscribeEvent()
{
  ArcGIS.Desktop.Framework.Events.ActiveToolChangedEvent.Unsubscribe(OnActiveToolChanged);
}
private void OnActiveToolChanged(ArcGIS.Desktop.Framework.Events.ToolEventArgs args)
{
  string prevTool = args.PreviousID;
  string newTool = args.CurrentID;
}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also