Change the font size and color of tooltip control text

string buttontooltip = "click here";
        public Form1()
        {
             InitializeComponent();
            toolTip1.SetToolTip(button1, buttontooltip);
            toolTip1.OwnerDraw = true;
            toolTip1.Draw += new DrawToolTipEventHandler(toolTip1_Draw);
             toolTip1.Popup += new PopupEventHandler(toolTip1_Popup);
         }

        void toolTip1_Popup(object sender, PopupEventArgs e)
        {
           e.ToolTipSize = TextRenderer.MeasureText(buttontooltip, new Font("Arial", 16.0f));
        }

        void toolTip1_Draw(object sender, DrawToolTipEventArgs e)
         {
             using (e.Graphics)
            {
               Font f = new Font("Arial", 16.0f);
                 e.DrawBackground();
                e.DrawBorder();
                buttontooltip = e.ToolTipText;
                 e.Graphics.DrawString(e.ToolTipText, f, Brushes.Red, new PointF(2, 2));
              
            }

        }