.NET UPC-A Barcode Generator
Generate UPC-A barcode labels using c#, vb.net in asp.net mvc, windows application

     BarCode upca = new BarCode();
     upca.Symbology = KeepAutomation.Barcode.Symbology.UPCA;
     upca.CodeToEncode = "01234567891";
     upca.generateBarcodeToImageFile("c://upca-csharp.tiff");

     Dim upca As KeepAutomation.Barcode.Bean.BarCode = New KeepAutomation.Barcode.Bean.BarCode

     upca.Symbology = KeepAutomation.Barcode.Symbology.UPCA
     upca.CodeToEncode = "01234567891"
     upca.generateBarcodeToImageFile("c:/upca-vbnet.tiff")

     BarCode upca = new BarCode();
     // Set barcode symbology type to UPCA, UPCASup2, UPCASup5
     upca.Symbology = KeepAutomation.Barcode.Symbology.UPCASup2;
     // Set UPC-A encoding code value. Valid input: 0-9. Length: 11 digits without checksum.
     upca.CodeToEncode = "11223344551";
     // Unit of measure, Pixel, Cm and Inch supported.
     upca.BarcodeUnit = BarcodeUnit.Pixel;
     // UPC-A image resolution in DPI.
     upca.DPI = 72;

     //Apply checksum for UPC-A barcode.
     upca.ChecksumEnabled = true;
     // Display checksum in the UPC-A barcode text
     upca.DisplayChecksum = true;

     // Set UPC-A image size

     // UPC-A bar module width (X dimention), default value is 1 pixel.
     upca.X = 2;
     // UPC-A bar module height (Y dimention), default is 50 pixel.
     upca.Y = 60;
     // Image left margin size, 10X is automatically added to go with specification.
     upca.LeftMargin = 0;
     // Image right margin size, 10X is automatically added to go with specification.
     upca.RightMargin = 0;
     // UPC-A image top margin size
     upca.TopMargin = 0;
     // UPC-A image bottom margin size
     upca.BottomMargin = 0;
     // UPC-A orientation, 90, 180, 270 degrees supported
     upca.Orientation = KeepAutomation.Barcode.Orientation.Degree0;

     // UPC-A supplement code of 2 or 5 digits
     upca.SupplementCode = "02";
     // UPC-A supplement bar height vs primary bar height ratio.
     upca.SupplementHeight = 0.7f;
     // Space between barcode and supplement barcode
     upca.SupplementSpace = 15;

     // Set UPC-A human readable text style

     // Display human readable text
     upca.DisplayText = true;
     upca.TextFont = new Font("Arial", 10f, FontStyle.Regular);
     // Space between barcode and text
     upca.TextMargin = 6;

     // enerate UPC-A barcodes in image format JPEG
     upca.generateBarcodeToImageFile("C://barcode-upca-csharp.jpeg");

     /* Create UPC-A barcodes in Stream object
     upca.generateBarcodeToStream(".NET System.IO.Stream Object");

     Draw & Print UPC-A barcodes to Graphics object
     upca.generateBarcodeToGraphics(".NET System.Drawing.Graphics Object");

     Generate UPC-A barcodes & write to byte[]
     byte[] barcodeInBytes = upca.generateBarcodeToByteArray();

     Bitmap barcodeInBitmap = upca.generateBarcodeToBitmap();
     */

     Dim upca As KeepAutomation.Barcode.Bean.BarCode = New KeepAutomation.Barcode.Bean.BarCode
     upca.Symbology = KeepAutomation.Barcode.Symbology.UPCASup2
     upca.CodeToEncode = "22446688001"

     'Apply checksum for UPCA barcode.
     upca.ChecksumEnabled = True
     'Display checksum in UPCA barcode text
     upca.DisplayChecksum = True

     'UPCA unit of measure, Pixel, Cm and Inch supported. 
     upca.BarcodeUnit = KeepAutomation.Barcode.BarcodeUnit.Pixel
     'UPCA image resolution in DPI.
     upca.DPI = 72

     'Set UPCA image size

     'UPCA bar module width (X dimention)
     upca.X = 1
     'UPCA bar module height (Y dimention)
     upca.Y = 60

     'Image left margin size, a 10X is automatically added according to specification.
     upca.LeftMargin = 0
     'Image right margin size, a 10X is automatically added according to specification.
     upca.RightMargin = 0
     'UPCA image top margin size'
     upca.TopMargin = 0
     'UPCA image bottom margin size'
     upca.BottomMargin = 0

     'UPCA supplemental data settings. 
     'To enable this, you need to set barcode symbology into "UPCASup2", or "UPCASup5"
     'Supplement code. It should be 2 or 5 digits
     upca.SupplementCode = "02"
     'Supplement bar height vs primary bar height ratio.
     upca.SupplementHeight = 0.8F
     'Space between barcode and supplement barcode
     upca.SupplementSpace = 15


     'Orientation, 90, 180, 270 degrees supported' UPCA image bottom margin size
     upca.Orientation = KeepAutomation.Barcode.Orientation.Degree0
     'UPCA image formats in Png, Gif, Jpeg/Jpg, Tiff, Bmp, etc.
     upca.ImageFormat = System.Drawing.Imaging.ImageFormat.Bmp

     'Set UPCA human readable text style
     upca.DisplayText = True
     upca.TextFont = New Drawing.Font("Arial", 10.0F, Drawing.FontStyle.Regular)
     'Space between barcode and text
     upca.TextMargin = 6

     upca.generateBarcodeToImageFile("C://upca-vb-net.bmp")