C#

private void button3_Click(object sender, EventArgs e)
       {
           printDocument1.Print();
       }

       private void printDocument1_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
       {
           PaintEventArgs myPaintArgs = new PaintEventArgs(e.Graphics, new Rectangle(new Point(0, 0), this.Size));
           InvokePaint(dataGridView1, myPaintArgs);
       }

foreach(var obj in listbox.items)
{
MessageBox.Show(obj.ToString());
}

foreach (var obj in listbox.Items)
  {
    ?????????????????
  }