WIA_DPS_HORIZONTAL_SHEET_FEED_SIZE
The WIA_DPS_HORIZONTAL_SHEET_FEED_SIZE property contains the physical horizontal dimensions of scanner's document feeder, in thousandths of an inch (.001). The WIA minidriver creates and maintains this property.
Property Type: VT_I4
Valid Values: WIA_PROP_NONE
Access Rights: Read-only
Requirements
Version: Beginning with Windows Vista, the WIA_DPS_HORIZONTAL_SHEET_FEED_SIZE property is still available at the root level of the WIA driver, but it has been replaced by the WIA_IPS_MAX_HORIZONTAL_SIZE property, so you should consider it optional.
Header: wiadef.h (include Wiadef.h)