WIA Automation Library 2.0 does not support duplex scan
This article helps you resolve the problem that when you scan documents using an application that uses Windows Image Acquisition (WIA) Automation Library 2.0, the application will fail to perform a duplex scan.
Original product version: Windows
Original KB number: 2709992
When scanning documents using an application that uses the WIA Automation Library 2.0, the application will fail to perform a duplex scan. The application scans one side of the document but not the second side.
This is a limitation of the WIA Automation Library 2.0.
You can avoid this problem by developing your application using native WIA 2.0 (Windows Visa and Windows 7) or WIA 1.0 (Windows XP).
WIA Tutorial provides step-by-step instructions to use WIA in real-world applications.