/// <summary>
/// Allows to generate barcode using System.Drawing libraly.
/// </summary>
public static class GdiBitmapBarcodeGenerator
{
    /// <summary>
    /// Initializes the <see cref="GdiBitmapBarcodeGenerator"/> class.
    /// </summary>
    static GdiBitmapBarcodeGenerator()
    {
        // initialize Vintasoft.Barcode.Gdi assembly - must be called only once
        // initialization is necessary if text value of barcode should be drawn on barcode image
        Vintasoft.Barcode.GdiAssembly.Init();
    }

    /// <summary>
    /// Returns the Code128 barcode as <see cref="System.Drawing.Bitmap"/>.
    /// </summary>
    /// <param name="value">The barcode value.</param>
    /// <returns>A <see cref="System.Drawing.Bitmap"/> object.</returns>
    public static System.Drawing.Bitmap GetCode128BarcodeAsBitmap(string value)
    {
        // create the barcode writer
        using (Vintasoft.Barcode.BarcodeWriter barcodeWriter = new Vintasoft.Barcode.BarcodeWriter())
        {
            // set barcode writer settings
            barcodeWriter.Settings.Barcode = Vintasoft.Barcode.BarcodeType.Code128;
            barcodeWriter.Settings.Value = value;

            // get a barcode image as System.Drawing.Bitmap
            return Vintasoft.Barcode.GdiExtensions.GetBarcodeAsBitmap(barcodeWriter);
        }
    }
}

''' <summary>
''' Allows to generate barcode using System.Drawing libraly.
''' </summary>
Public NotInheritable Class GdiBitmapBarcodeGenerator
    Private Sub New()
    End Sub
    ''' <summary>
    ''' Initializes the <see cref="GdiBitmapBarcodeGenerator"/> class.
    ''' </summary>
    Shared Sub New()
        ' initialize Vintasoft.Barcode.Gdi assembly - must be called only once
        ' initialization is necessary if text value of barcode should be drawn on barcode image
        Vintasoft.Barcode.GdiAssembly.Init()
    End Sub

    ''' <summary>
    ''' Returns the Code128 barcode as <see cref="System.Drawing.Bitmap"/>.
    ''' </summary>
    ''' <param name="value">The barcode value.</param>
    ''' <returns>A <see cref="System.Drawing.Bitmap"/> object.</returns>
    Public Shared Function GetCode128BarcodeAsBitmap(value As String) As System.Drawing.Bitmap
        ' create the barcode writer
        Using barcodeWriter As New Vintasoft.Barcode.BarcodeWriter()
            ' set barcode writer settings
            barcodeWriter.Settings.Barcode = Vintasoft.Barcode.BarcodeType.Code128
            barcodeWriter.Settings.Value = value

            ' get a barcode image as System.Drawing.Bitmap
            Return Vintasoft.Barcode.GdiExtensions.GetBarcodeAsBitmap(barcodeWriter)
        End Using
    End Function
End Class