How to set the column header background

private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            for (int c = 0; c < dataGridView1.ColumnCount; c++)
            {
                if (e.RowIndex < 0&& e.ColumnIndex == c)
                {
                    Font drawFont = new Font("Microsoft Sans Serif", 10);
                    SolidBrush drawBrush = new SolidBrush(Color.Black);

                    e.Graphics.DrawImage(Properties.Resources.title_bg_center, e.CellBounds);
                    e.Graphics.DrawString(dataGridView1.Columns[c].HeaderText, drawFont, drawBrush, e.CellBounds);

                    e.Handled = true;
                    drawBrush.Dispose();
                }
            }
        }