I am writing a module and would like to take some action if an admin creates or deletes users or roles outside my module. Is there a system-wide event my module can subscribe to that would allow it to get notified when this happens? I poked around but don't see anything.

Thanks,

Roger Martin

Not sure how you would expect this to work ... DNN is a stateless web application.  Your module only gets loaded/executed when a page that contains is is displayed or refreshed. It's not like a desktop program or service that would be running all the time.   If the Page_Load of your module simply looked at the roles and/or users table to determine if any were added since the last time you checked, would that suffice?  you could store a timestamp as a module setting, then query the tables for records added since that time, process any new records and update the timestamp in your module settings when done.  Event notification works well for 2 modules on the same page, since they are both loaded and running, but a system event of the type you are asking about doesn't fit well with the design of a web application that is primarily controlled by a client browser.