有同学项目要用barcode，这有一堆。
大家可以试下。
http://www.idautomation.com/formscontrols/free/
http://www.gotdotnet.com/Community/UserSamples/Details.aspx?SampleGuid=e59c9
http://www.codeproject.com/cs/miscctrl/barcodectl.asp
http://sourceforge.net/project/showfiles.php?group_id=91274&package_id=96241&release_id=397342
http://paulbanks.dnsdojo.net/projects/barcode/