In this country we call "Corn Syrup" Maltodextrin. Any form of starch can be enzymatically turned into this product and by the end of the process what it is made from will have very little bearing to its chemical make up. Goto http://en.wikipedia.org/wiki/Maltodextrin to find out more.
Americans call fructose, "corn syrup" - it's the stuff that's in all their sodas (and makes their coca cola taste super sweet). But this is "High Fructose Corn Syrup" ... so I'm probably just confusing the subject.
If it's fructose the recipe calls for replace it 1:1 with dextrose.