Coordinates in PDF Vs in Dynamic PDF

I'm adding labels to imported PDF documents. The documents have items positioned that I want to align with. I know the PDF coordinates of each object, but the conversion between PDF coordinates and DynamicPDf corrdinates does not seem as simple as I hoped.

How do I convert between the coordinate systems?

The x coordinate will be the same in DynamicPDF as if you opened the PDF in Illustrator. The y coordinate is the page size - the y coord in Illustrator. (Eg. A4 page is 842 points)

Hello,

The coordinate system used by our products is points. There are 72 points in 1 inch. More details about our coordinate system can be found in the Help Documentation on our web site.

Thanks,
ceTe Software Support Team