Bar Code Scanner

If you barcode scanner is compatible with c# application. Directly integrate it into VS project. For me, i used this barcode scanner solution for c# application. To have a quick try, see this barcode scanner demo online.

I have used this method to read a barcode in c#.net application:
Firstly, please add "BarcodeReader.dll" to your Visual Studio project reference.As for the "BarcodeReader.dll",you can search it in google.
Secondly,click "Project" and select "Add Reference...".
Thirdly,click "Browse" to locate your "BarcodeReader.dll", and click "OK".Now you can use "BarcodeReader" as the namespace for your .NET class project.
Now begin to read barcodes in c#.net from image file:
Simply pass your target barcode image file and barcode type to "BarcodeReader.readBarcode" method. Then,the barcode reader control will immediately scan & output all barcodes found.
C# Sample code:

  String[] datas = BarcodeReader.readBarcode("C://csharp-sample-code128.png", BarcodeType.Code128);

http://www.onbarcode.com/tutorial/csharp-barcode-reader.html

http://stackoverflow.com/questions/9150263/barcode-scanner-programming-in-c-sharp

http://stackoverflow.com/questions/8621033/how-can-i-read-bar-code-from-my-bar-code-reader

Just have a look at the tutorial by Krishna.. He has covered it very well...
http://www.c-sharpcorner.com/UploadFile/krishnasarala/barcode-scanner-in-C-Sharp/


Even there is a Open source API for it on codeplex... 
http://freebarcode.codeplex.com/