Help with Snapping on Custom Tools

Hello,

I'm having trouble with following the basic snapping instructions

http://resources.arcgis.com/en/help/...000001s1000000

I can see these Interfaces in the API reference, but they come up as undefined when I try to use them in code.
ISnappingEnvironment
IPointSnapper
ISnappingFeedback

I have ESRI.ArcGIS.Geometry referenced.
Does anyone have working 10.1 code for snapping. I am attempting to use this functionality outside of an edit session.

Thank you,
Corbin de Bruin