Curved Shapes

[shredder78]

I'm still new to inventor, so this might be an easy problem. I'm trying to draw a sheet metal part that is rolled on a jig. That part is okay. My problem is that there are holes in it on a rounded surface. The holes are put in when the part is flat. So how can I get my workplane tangent to that section so my holes are straight?
Any help is great.

 

[loeb]

Since you are actually putting the holes in before forming, you should probably "unfold" the part, then put the holes in.