Windows Image Acquisition (WIA) is a new standard for scanner drivers.
Microsoft introduced WIA drivers in Windows ME. WIA provides developers with a relatively easy way to write support for scanners and digital cameras.
The other standard in scanners drivers is TWAIN, which is older and more sophisticated then WIA.
TWAIN scanning dialogs can be extremely comprehensive, but since they are provided for the scanner manufacturer, the are different for each scanner brand.
WIA scanning dialogs are provided by Microsoft and they are look always the same, no matter which scanner is used, but they are very basic and do not provide the same functionality than TWAIN.
Bersoft Scan Helper provides a far better proprietary dialog than the standard one to handle WIA Scanners. It remains open between scans, allowing the user to scan any number of pages and also to select the scan area and other options more conveniently than using the standard WIA scan dialog.
Also Bersoft Scan Helper can use its own dialog for TWAIN scanners or use the scanning dialog provide by the scan manufacturer.