Visual C# examples using the ActiveBarcode REST API

ActiveBarcodeREST-API.cs

// On a form are an input field (Textbox1), 
// a Picturebox (Picturebox1) and a button (Button1).
// 
// If you click the button, a barcode with the text of the input field 
// is called up via barcode API and drawn into the picturebox.
//
private void button1_Click(object sender, EventArgs e)
{
  string ReqUrl = "https://api.activebarcode.net/v2/png?access=YOUR-KEY-HERE&";
  var ReqParam = "code =CODE128&width=" + System.Convert.ToString(pictureBox1.Width) 
    + "&height=" + System.Convert.ToString(pictureBox1.Height) 
    + "&text=" + textBox1.Text;
  System.Net.WebRequest req = System.Net.WebRequest.Create(ReqUrl + ReqParam);
  using (System.Net.WebResponse request = req.GetResponse())
  {
    using (System.IO.Stream stream = request.GetResponseStream())
    {
      pictureBox1.Image = new Bitmap(System.Drawing.Image.FromStream(stream));
    }
  }
}