C#

Ean13 ean13 = new Ean13();<br />
ean13.CountryCode      = "84";<br />
ean13.ManufacturerCode = "862";<br />
ean13.ProductCode      = "3274243";<br />
ean13.ChecksumDigit    = "7";<br />
ean13.Scale            = 1f;<br />
Bitmap bmp = ean13.CreateBitmap();<br />
<br />
MemoryStream stream = new MemoryStream();<br />
bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);<br />
byte[] buffer = new Byte[stream.Length];<br />
stream.Position = 0;<br />
stream.Read(buffer, 0, (int) buffer.Length);

buffer = null;<br />
stream.Close();

<code language="c#">

        private void Form1_Load(object sender, EventArgs e)
        {
            MemoryStream memStream = new MemoryStream();
            byte[] myBytes;

            using (Bitmap bmp = new Bitmap(50, 50))
            using (Graphics grfx = Graphics.FromImage(bmp))
            {
                grfx.FillRectangle(Brushes.Red, new Rectangle(0, 0, 50, 50));
                bmp.Save(memStream, System.Drawing.Imaging.ImageFormat.Bmp);
                myBytes = new byte[memStream.Length];
                memStream.Position = 0;
                memStream.Read(myBytes, 0, (int)memStream.Length);
                /* uncomment these lines to draw three white pixels on the second pictureBox */
                /*
                myBytes[101] = 255;
                myBytes[102] = 255;
                myBytes[103] = 255;
                myBytes[506] = 255;
                myBytes[507] = 255;
                myBytes[508] = 255;
                myBytes[910] = 255;
                myBytes[911] = 255;
                myBytes[912] = 255;
                */
                pictureBox1.Image = Image.FromStream(memStream);
                pictureBox2.Image = Image.FromStream(new MemoryStream(myBytes));
            }
        }
</code>

public System.Drawing.Bitmap CreateBitmap( )
{
  float tempWidth  = ( this.Width  * this.Scale ) * 100 ;
  float tempHeight = ( this.Height * this.Scale ) * 100;

  System.Drawing.Bitmap bmp = new System.Drawing.Bitmap( (int)tempWidth, (int)tempHeight );

  System.Drawing.Graphics g = System.Drawing.Graphics.FromImage( bmp );
  this.DrawEan13Barcode( g, new System.Drawing.Point( 0, 0 ) );
  g.Dispose( );
  return bmp;
}

public void DrawEan13Barcode( System.Drawing.Graphics g, System.Drawing.Point pt )
{
  float width = this.Width * this.Scale;
  float height = this.Height * this.Scale;

  //  EAN13 Barcode should be a total of 113 modules wide.
  float lineWidth = width / 113f;

  // Save the GraphicsState.
  System.Drawing.Drawing2D.GraphicsState gs = g.Save( );

  // Set the PageUnit to Inch because all of our measurements are in inches.
  g.PageUnit = System.Drawing.GraphicsUnit.Millimeter;

  // Set the PageScale to 1, so a millimeter will represent a true millimeter.
  g.PageScale = 1;

  System.Drawing.SolidBrush brush = new System.Drawing.SolidBrush( System.Drawing.Color.Black );

  float xPosition = 0;

  System.Text.StringBuilder strbEAN13 = new System.Text.StringBuilder( );
  System.Text.StringBuilder sbTemp = new System.Text.StringBuilder( );

  float xStart = pt.X;
  float yStart = pt.Y;
  float xEnd = 0;

  System.Drawing.Font font = new System.Drawing.Font( "Arial", this._fFontSize * this.Scale );

  // Calculate the Check Digit.
  this.CalculateChecksumDigit( );

  sbTemp.AppendFormat( "{0}{1}{2}{3}", 
  this.CountryCode,
  this.ManufacturerCode,
  this.ProductCode, 
  this.ChecksumDigit );


  string sTemp = sbTemp.ToString( );

  string sLeftPattern = "";

  // Convert the left hand numbers.
  sLeftPattern = ConvertLeftPattern( sTemp.Substring( 0, 7 ) );

  // Build the UPC Code.
  strbEAN13.AppendFormat( "{0}{1}{2}{3}{4}{1}{0}",
  this._sQuiteZone, this._sLeadTail,
  sLeftPattern,  
  this._sSeparator,
  ConvertToDigitPatterns( sTemp.Substring( 7 ), this._aRight ) );

  string sTempUPC = strbEAN13.ToString( );

  float fTextHeight = g.MeasureString( sTempUPC, font ).Height;

  // Draw the barcode lines.
  for( int i = 0; i < strbEAN13.Length; i++ )
  {
  if( sTempUPC.Substring( i, 1 ) == "1" ) 
  {
    if( xStart == pt.X )
        xStart = xPosition;

  // Save room for the UPC number below the bar code.
  if( ( i > 12 && i < 55 ) || ( i > 57 && i < 101 ) )
  // Draw space for the number
  g.FillRectangle( brush, xPosition, yStart, lineWidth, height - fTextHeight );
  else
  // Draw a full line.
  g.FillRectangle( brush, xPosition, yStart, lineWidth, height );  
  }

  xPosition += lineWidth;
  xEnd = xPosition;
  }

  // Draw the upc numbers below the line.
  xPosition = xStart - g.MeasureString( this.CountryCode.Substring( 0, 1 ), font ).Width;
  float yPosition = yStart + ( height - fTextHeight );

  // Draw 1st digit of the country code.
  g.DrawString( sTemp.Substring( 0, 1 ), font, brush, new System.Drawing.PointF( xPosition, yPosition ) );

  xPosition += ( g.MeasureString( sTemp.Substring( 0, 1 ), font ).Width + 43 * lineWidth ) -
           ( g.MeasureString( sTemp.Substring( 1, 6 ), font ).Width );

  // Draw MFG Number.
  g.DrawString( sTemp.Substring( 1, 6 ), font, brush,  new System.Drawing.PointF( xPosition, yPosition ) );

  xPosition += g.MeasureString( sTemp.Substring( 1, 6 ), font ).Width + ( 11 * lineWidth );

  // Draw Product ID.
  g.DrawString( sTemp.Substring( 7 ), font, brush, new System.Drawing.PointF( xPosition, yPosition ) );

  // Restore the GraphicsState.
  g.Restore( gs );
}

private void button1_Click(object sender, System.EventArgs e)
{
	using( Bitmap bmp = new Bitmap( 50, 50 ) )
	using( Graphics grfx = Graphics.FromImage( bmp ) )
	{
		grfx.FillRectangle( Brushes.Red, new Rectangle(0,0,50,50) );
		using( FileStream stream = new FileStream( @"C:\test.jpg", FileMode.Create ) )
		{
			bmp.Save( stream, System.Drawing.Imaging.ImageFormat.Jpeg );
		}
	}
}