The "Curve Bend" tool is a little weird to use. In my example, the bar is 9" X 0.5" X 1". You click in the bar then the curve. the first question is "Two points for bend height axis", that's the bar length (9"). this bar will either be extended or shortened to match the curve length. Next is "Select two points for alignment axis". This ends up being the thickness of the curve. Click on the endpoints of the 1" direction and you will get shape A, click on the endpoints of the 0.5" direction and you get shape B.