https://help.arcgis.com/en/sdk/10.0/arcobjects_net/componenthelp/0014/0014000000m0000000.htm
GxToolset CoClass (ArcObjects .NET 10 SDK)
coclassarcobjectssdk
https://help.arcgis.com/en/sdk/10.0/arcobjects_net/componenthelp/0021/0021000000vz000000.htm
TrackPointOperation CoClass (ArcObjects .NET 10 SDK)
coclassarcobjectssdk