eDrawings API camera manipulation

Hi, in SolidWorks I am able to write an AddIn for controlling the camera with my own experimental input device. Is this possible with eDrawings? I don't see anything in the API that suggests eDrawing AddIns are possible or camera control for that matter. However, the SpaceNavigator works in both SolidWorks and eDrawings, which suggests custom camera control in eDrawings might be possible. Does anyone know how the SpaceNavigator does it? Thanks!

SolidworksApi macros