Use Acrobat SDK to rotate doc’s in PDF

I downloaded the Adobe Acrobat SDK, and got simple functions running using the 4.0 Type Library.
I need to Rotate my document and save it rotated. Therefore I expect to use the command PDPageSetRotate.
Do I need more references? Which objecttype does this method belong to?

I’d love it if you could give me a few lines of code, to learn by example.