Thanks! I've added "Insert Guid" merely as an example of how to bind a custom C# script to a menu item or hotkey:

<hotkey name="InsertGuid" menuItem="Insert &amp;Guid" isScript="true"> <!-- this is an example of a C# scriptlet handler --> <![CDATA[ await Host.FeedTextAsync(Guid.NewGuid().ToString("B").ToUpper(), Token); ]]> </hotkey>