private void textBox1_TextChanged(object sender, EventArgs e) { g.Clear(Color.White); CString cs = new CString(textBox1.Text); cs.OnImage(g, 10, 10, 1000, Pens.Black); StringBuilder sb = new StringBuilder(); cs.ExplainToStringbuilder(sb); this.textBox2.Text = sb.ToString(); pictureBox1.Refresh(); }