How to stamp text & icons onto acquired images in Dynamic .NET TWAIN?

Microsoft .NET Framework has its built-in method Graphics.DrawImage to add an image on another at the specified location.

Here is a simple sample in C#:

        private void button2_Click(object sender, EventArgs e)
        {
            short index = m_ImageCore.ImageBuffer.CurrentImageIndexInBuffer;
            System.Drawing.Bitmap original = m_ImageCore.ImageBuffer.GetBitmap(index);
            System.Drawing.Image icon = System.Drawing.Image.FromFile("<the path for the stamp>");
            Graphics g = Graphics.FromImage(original);
            g.DrawImage(icon, itop, ileft, iwidth, iheight);
            g.Dispose();
            m_ImageCore.ImageBuffer.SetBitmap(index, original);
        }
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