The acquired image Y-direction scaling value before transferring.
The vertical scaling percentage to be applied to the scanned page within the scanner device. This value can be from 1 to maximum of 65535. For example, 100 means no scaling, 50 means scaling down to 50 of the original size, and 200 means scaling up to 200 of the original size.
Note: This member is only available on VISTA (WIA 2.0 version).
Refer to WiaSession.GetRootItem example.