I am developing custom ArcMap toolbar with various AddIn tools, button and extension. I see the sample how to access the ActiveView events in the extension Initialize() method.

 private void Initialize()
      // If the extension hasn't been started yet or it's been turned off, bail
      if (s_extension == null || this.State != ExtensionState.Enabled)

      // Reset event handlers
      IActiveViewEvents_Event avEvent = ArcMap.Document.FocusMap as IActiveViewEvents_Event;
      avEvent.ItemAdded += AvEvent_ItemAdded;
      avEvent.ItemDeleted += AvEvent_ItemAdded;
      avEvent.SelectionChanged += UpdateSelCountDockWin;
      avEvent.ContentsChanged += avEvent_ContentsChanged;
              // ? Possible to access AddIn button even here ?
              myCustomAddInToolbar.myCustomAddInButton.RaiseCustomEvent += HandleCustomEvent; 

How can I wire my custom AddIn Button? I don't know how to access the AddIn button events from here. Is there any ArcMap(ArcObjects) Interface to access AddIn Toolbar/Button Events? Thanks

  • Can you provide link to the sample? Jun 19, 2013 at 22:38
  • Building add-ins for ArcGIS for Desktop - Custom Selection Sample resources.arcgis.com/en/help/arcobjects-net/conceptualhelp/…
    – mitaka
    Jun 20, 2013 at 12:13
  • I added another AddIn button to the sample that processes the Feature Selection on the ArcMap. I want to display some data in the custom ArcMap Dock Window (SelCountDockWin) when the AddIn button is clicked.
    – mitaka
    Jun 20, 2013 at 12:21
  • 3
    Usually it's the button's job to find the Extension and call methods on the Extension. Extensions usually shouldn't know about buttons. Have you tried having your button find the extension (or dockable window) and call a method on it? Jun 20, 2013 at 12:49
  • My bad. I had the impression that I have to set the event handlers in the extension. It worked the way you suggested. Thanks!
    – mitaka
    Jun 20, 2013 at 14:21


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