Look at the interface EPiServer.Core.IContentEvents that has a bunch of events that you can set up eventhandlers for. The instance of the event can be retrevied from IOC container as:
var contentEvents = ServiceLocator.Current.GetInstance<IContentEvents>();
I want to "do something" (in this case some integration with another system) when a page is created or changed in edit mode. I can't find any appropriate method to override in Epi 7.
Is there anyone that can show me how this is done?