The companion product to Barcodes For Documents is the ClearImage SDK, which contains engines for recognizing the following barcodes:
Over 20 1D Barcode symbologies
PDF417 family of barcodes
DataMatrix family of barcodes
The ClearImage SDK is free and contains a very useful demo program that can be used to read the barcodes on images from
Scanning target documents
Faxing document to fax server
Email PDF and image files
Download the ClearImage SDK and install it, then run the ClearImage demo application from Start/ClearImage/ClearImage Demo, as shown below: