The WIA_IPS_MAXIMUM_BARCODES_PER_PAGE property describes the maximum number of barcodes that the device can and should detect on one document page side when barcode detection is enabled.
Property Type: VT_I4
Valid Values: WIA_PROP_RANGE
Access Rights: Read/Write
A value of 0 means "no maximum." The application can decrease the current value of this property in order to reduce the time spent on barcode detection and increase the scan speed.
This property is required for all Barcode Reader items, but it can be implemented as a range container containing only the value of 0 (minimum equal with maximum and set to 0, step size of 0).