Getting Spline Meshes to Work ingame

Hey there:)
There are quite a few Tutorials out there for Spline Meshes but none of them seems to explain how to make them Work ingame. Im looking for a Tutorial that show how to make them work ingame :confused: (I want the player to be able to define where to place the spline and edit the spline points but not in a dev kit , ingame )Anyone can help me or does know a tutorial that can?