That link *seemed* to indicate that performing OCR operations in Office 2010 required using OneNote... is it possible that you simply can't use the .OCR method from within the Winword process in 2010?

I'm totally unfamiliar with this area... but I'm guessing there are ramifications of Microsoft removing the MODI functionality in Word 2010. You may need to do some kind of CreateObject/GetObject functionality on the OneNote application and attempt to do your OCR from there.