Hi Frederick,

> Is there a standard dialog that can be displayed prior to execution of a potentially very disruptive
> operation that can ask the user to confirm execution or allow canceling?

There is not - things like that are usually generated internally by the GeometryFactory infrastructure in a separate process called moi_commandprocessor.exe instead of the main UI thread so that the cancel button in the UI remains responsive and clickable.

But that infrastructure is part of the internal C++ API, it isn't accessible by the script API.

If you have a long running script there is a mechanism that will try to exit it if you hold down the Esc key.

- Michael