Make a 3D object from a 2d-shape and a vertex

[Somian]

Hi, I'm trying to find out how to make a 2D-shape "follow" all the (or select) vertices of another object in 2.5. I think, I did this before but it was a long time ago.
i've been looking through the manual but couldn't find it.

here's a sketch of what I want to do.



thx in advance.

[beniboy]

model your 2D shape , select it pres <e> and move your mouse.