The WIA_DPS_SCAN_AHEAD_PAGES property contains a value that indicates whether a scanner will cache pages in a scanner buffer before sending them to an application.
Note This property is now obsolete. Use WIA_IPS_SCAN_AHEAD instead.
Property Type: VT_I4
Valid Values: WIA_PROP_RANGE (from zero through the maximum number of pages that the document feeder can hold)
Access Rights: Read/write
If the WIA_DPS_SCAN_AHEAD_PAGES property is zero, scan ahead is disabled, and the scanner will not scan ahead any pages.
If the scanner performs data transfers on the buffered scan-ahead item, the scanner will retrieve the buffered pages. WIA properties cannot be changed during a scan-ahead operation. WIA_DPS_SCAN_AHEAD_PAGES is optional.
|Wiadef.h (include Wiadef.h)|