C#

// will draw every other item with Red background
if (e.Index % 2 != 0)
{
    e = new DrawItemEventArgs(
        e.Graphics,
        e.Font,
        e.Bounds,
        e.Index,
        e.State,
        e.ForeColor, Color.Red);
}
e.DrawBackground();
if (sender is ListBox)
{
    ListBox listBox = (ListBox)sender;
    e.Graphics.DrawString(
        listBox.Items[e.Index].ToString(),
        e.Font,
        new SolidBrush(e.ForeColor),
        e.Bounds);
}