System.Windows.Forms.DrawListViewColumnHeaderEventArgs.DrawBackground C# (CSharp) Method

        public void DrawBackground ()
        {
		// Always draw a non-pushed button
		//ThemeEngine.Current.CPDrawButton (graphics, bounds, ButtonState.Normal);
        }

 protected override void OnDrawColumnHeader(DrawListViewColumnHeaderEventArgs e)
 {
     base.OnDrawColumnHeader(e);
     if (e.ColumnIndex == 0)
     {
         var headerCheckBox = new CheckBox {Text = "", Visible = true};
         SuspendLayout();
         e.DrawBackground();
         headerCheckBox.BackColor = Color.Transparent;
         headerCheckBox.UseVisualStyleBackColor = true;
         headerCheckBox.BackgroundImage = Resources.ListViewHeaderCheckboxBackgroud;
         headerCheckBox.SetBounds(e.Bounds.X, e.Bounds.Y,
                                  headerCheckBox.GetPreferredSize(new Size(e.Bounds.Width, e.Bounds.Height)).
                                      Width,
                                  headerCheckBox.GetPreferredSize(new Size(e.Bounds.Width, e.Bounds.Height)).
                                      Height);
         headerCheckBox.Size =
             new Size(headerCheckBox.GetPreferredSize(new Size(e.Bounds.Width - 1, e.Bounds.Height)).Width + 1,
                      e.Bounds.Height);
         headerCheckBox.Location = new Point(4, 0);
         Controls.Add(headerCheckBox);
         headerCheckBox.Show();
         headerCheckBox.BringToFront();
         e.DrawText(TextFormatFlags.VerticalCenter | TextFormatFlags.Left);
         headerCheckBox.CheckedChanged += OnHeaderCheckboxCheckedChanged;
         ResumeLayout(true);
     }
     else
     {
         e.DrawDefault = true;
     }
 }