Thanks. I wasn't very specific and I apologize for that. This is about matching a profile of curve in order to create another shape who's edge will match. Lets say I have a curve (happens to be a closed curve here) that indeed is a combo of throughpoints and control points:




I then want to select the points (all the points along the edge of interest):




And then generate a curve from that selection (not a closed curve). That curve will then be made part of another curve later.

Thanks