Zen Barcode with characters. Winforms

Hi does anyone know how to include the numbers/strings too at the bottom when it draw the barcode?

Here is my code

     private void btnGenerate_Click_1(object sender, EventArgs e)
    {
        Zen.Barcode.Code128BarcodeDraw barcode = Zen.Barcode.BarcodeDrawFactory.Code128WithChecksum;
        pictureBox1.Image = barcode.Draw(textBox1.Text, 50);
    }

PS should i save it in a database column and call it there too? Thank you

UPDATE base from sir VVatashi answer. here is the new output.

But its overlapping the barcode i want it to look something like this:

Thank you