title: How can I convert EventArgs to PaintEventArgs, C#
body: <p>I want to call <em>OnPaint()</em> when MCU_timer_Tick() is called.
  How can I do?</p>
  
  <pre><code>    private void MCU_timer_Tick(object sender, EventArgs e)
      {
          ...
      }
      protected override void OnPaint(PaintEventArgs e)
      {
        Graphics g = e.Graphics;
  
        int width = 30;
        int x, y;
        x = 150;
        y = 530;
        double color_max;
        color_max = 255;
        SolidBrush aBrush_1 = 
          new SolidBrush(Color.FromArgb(100, 255, 
          (int)(255 * color_map[0] / color_max), 0)); //color_map[0] is real value
        g.FillEllipse(aBrush_1, x-100, y, width * 2, width);
  </code></pre>