How do I add a scale bar or north arrow directly on the map control?

I've already looked into 开发者_StackOverflow中文版SurroundFrames and MapSurrounds, but this appears to be for cases in which you want to add these elements to a printed page. I, on the other hand, am using the MapControl within a live application, and I would like these element directly on the map, in the same way you see them on Google Maps.

Do I have to add these things from scratch using custom symbols and capturing events, or does ArcObjects automate this in any way?

The PageLayoutControl is designed to do this. Scale bars, legends, north arrow, map insets, titles, overview maps, etc. are all layout elements.