WIA_DPS_HORIZONTAL_BED_SIZE
The WIA_DPS_HORIZONTAL_BED_SIZE property contains the physical dimensions of a scanner's flatbed, 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Version: Beginning with Windows Vista, the WIA_DPS_HORIZONTAL_BED_SIZE property is still available, but it has been replaced by the WIA_IPS_MAX_HORIZONTAL_SIZE property, so you should consider it optional.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)