how to create surface from only 3 curves

say i have an edge curve on a surface that is not a straight line. its a curvy edge. then on each end of that is a perpendicular line. whats the best way to make a surface from that. boundary needs all four sides. swept and blends want sketches. i just want to use the 3 pieces i already have. i can do it in 2 seconds in mastercam 9. you would think proe would be much better at this. am i not seeing a fuction for that. anyone have any advice it would be greatly appreciated. maybe i am just not looking in the right spot. thanks

Daryl