I just want to develop a simple barcode reader application. I have tried some examples found on the internet and not successful.

I tried google zxing also, but gave run time error.

If any one develop this kind of application please help me also to develop it

thanks

just recommond you a basic barcode reader SDK. Are you trying to develop a barcode reader for fun or commercial use? If your answer is latter one, I suggest that maybe you should develop a more powerful barcode reader.

Barcode Reader for .NET is highly recommended.
BizCode Barcode Reader for .NET is a high-quality barcode recognition component DLL for barcode scanning & reading in Microsoft .NET development environments, such as Visual Studio 2005, 2008 and 2010.
Here is the sample code of C#:
using BusinessRefinery.Barcodes.Reader;
// Read a Code 39 barcodes image in C# class
string[] barcodes = BarCodeReader.scanBarCode
(bmp,BusinessRefinery.Barcodes.Reader.BarCodeType.CODE39);
// Read Data Matrix barcodes in C# class
string[] barcodes = BarCodeReader.scanBarCode
(bmp,BusinessRefinery.Barcodes.Reader.BarCodeType.DATAMATRIX);

In which platform would you like to read the barcode? Here are some free version of barcode readers which may give you some enlightment. Check them: barcode reader for .net, barcode reader for C#.