Scripting Acrobat 5 inc cropping

Does anybody know how to crop PDF’s in Acrobat. I can find the dimensions and save but can not find away to crop the PDF.

Thanks in advance

Steve

you have to set the page bounds property

set bounds of page 1 of current document to (left, top, right, bottom)

the bounds should be in points.

Cheers for that but is there away to determine where the trim marks are on the document