ArcObjects Library Reference (Carto)  

esriNorthArrowType Constants

North Arrow Types

Constant Value Description
esriSimpleNorth 0 Same as the data frame rotation.
esriTrueNorth 1 The direction of a meridian of longitude that converges on the North Pole.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.