I am developing windows mobile application to scan a product barcode by using in built camera. Can you tell me something about barcode reader sdk which are supporting windows mobile 7?
In Windows Phone 7, with the upcoming Mango update, there will be direct access to the camera feed, without having to take a picture of the barcode. Prior to Mango, there is a library that can be downloaded from Codeplex, called ZXIng (Zebra Crossing). http://silverlightzxing.codeplex.com/
Are you developing for Windows Phone, or Windows Mobile? There is no Windows Mobile 7 - with the complete rewrite, the name changed to Windows Phone.
There is always this library (zxing):
http://silverlightzxing.codeplex.com/
It does a pretty decent job, and is able to read a number of different barcodes/qrcodes/and so on.
I updated the link to the silverlight version.
You can see the documentation here: http://silverlightzxing.codeplex.com/documentation
It's fairly easy to implement, as he's given everything you need for WP7.
来源：https://stackoverflow.com/questions/7110246/is-there-any-free-barcode-reader-sdk-for-windows-phone-7