AWH,
I am unaware of a way to do this using purely AutoCAD, but I use the AutoCAD to send .dwg & .dxf files to my machinist partner who uses a script file for his vector input - which serves his CNC. I also create .stl files in AutoCAD to email for "rapid prototyping". Also, in some cases; Microsoft Excel can be used as a data cache to ascertain route closure. PEdit in AutoCAD can also become a "best friend" for many of these tasks.
Although I use AutoCAD r2002 (extremely customized by me), I haven't upgraded in years - due to AutoDesk's now "subscription versus ownership" policies. If I need a feature - I simply use AutoLISP to create it. There may become some things I cannot accomplish, but thus far this methodology has worked for me since year 2001.
Good luck,
Otis Guillebeau from Auburn, Georgia