I have an ArcObjects add-in button that adds attribute value info as a text graphic into a map document layout. Now, instead of using the add-in button click event, I would like the code to run on VisibleBoundsUpdatedEventHandler or when the active view has been updated. Can this be implemented through add-ins? The link below uses this for a panning tool. I'm not sure how and where to begin to implement this. Any suggestions or code samples would be most appreciated!