ScanDirection - specify the direction in which to scan for a barcode
ScanDirection is a mask that controls the directions in which the barcode reader will look for barcodes in an image, and is built from the following values:
1 = Left to Right
2 = Top to Bottom
4 = Right To Left
8 = Bottom to Top
For example, a value of 5 (1 + 4) means that the reader will look for barcode from left to right and right to left.
Note: This property replaces the Rotation property used in previous versions.
Default value: 15