I am building an add-in and I have several different windows, which I open with the code below. This works fine. However, how can I create the same window n times?

    UID dockWinID = new UIDClass();
    dockWinID.Value = ThisAddIn.IDs.MyWindow;

    IDockableWindow dockWindow = ArcMap.DockableWindowManager.GetDockableWindow(dockWinID);

  • What's the use case? Why do you want to do this?
    – blah238
    Commented Dec 15, 2012 at 6:03
  • Maybe something similar to attribute table windows? They are dockable. AFAIK, these windows are implemented as IDataWindows. I wonder if GenericWindow could help here, though it seems to be (uncomfortably) tied to ActiveX.
    – Petr Krebs
    Commented Dec 16, 2012 at 11:00

1 Answer 1


No, all add-in framework types are singletons (source), meaning they are only intended to exist one at a time. I am not sure but I think the same is also true for traditional COM dockable windows.

  • Yes, the same holds true for the classic IDockableWindowDef implementations.
    – Petr Krebs
    Commented Dec 16, 2012 at 10:55
  • Okay. As a workaround I manage the windows by myself with the WindowInteropHelper. I lost all the benefits like docking in ArcMap, but that was never important for me.
    – steffan
    Commented Dec 21, 2012 at 17:12

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