检查这个样本

private void listBox1_DrawItem(object sender,DrawItemEventArgs e)
{
    if (e.Index<0) return;
    //if the item state is selected them change the back color 
    if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
        e = new DrawItemEventArgs(e.Graphics,e.Font,e.Bounds,e.Index,e.State ^ DrawItemState.Selected,e.ForeColor,Color.Yellow);//Choose the color
 
    // Draw the background of the ListBox control for each item.
    e.DrawBackground();
    // Draw the current item text
    e.Graphics.DrawString(listBox1.Items[e.Index].ToString(),Brushes.Black,StringFormat.GenericDefault);
    // If the ListBox has focus,draw a focus rectangle around the selected item.
    e.DrawFocusRectangle();
}