画闪烁

Question

已经在屏幕上绘制了一些内容（作为其他所有内容的叠加）但是当我在绘图上移动某些内容时它会开始闪烁，我已经将DoubleBuffered设置为true 是他们用dll，函数，渲染来解决这个问题的方法吗？

private void button2_Click(object sender, EventArgs e)
{
    DoubleBuffered = true;
    SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
    backgroundWorker1.RunWorkerAsync();        
}

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    Point midx = new Point(960, 960);
    Point midy = new Point(540, 540);

    Point LinksBoven = new Point(10, 10);
    Point pt = Cursor.Position;
    string letter = "drawing on";
    float emSize = 12;

   while (true)
   {
       using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
       {                              
           System.Drawing.Pen myPen;
           myPen = new System.Drawing.Pen(System.Drawing.Color.FromArgb(0, 200, 0));
           g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

           if (cbCircel.Checked == true)
           {
               g.DrawEllipse(Pens.Black, midx.X - 10, midy.Y - 10, 20, 20);
           }

           if (cbKruis.Checked == true)
           {                                       
               g.DrawLine(myPen, 940, 540, 980, 540);
               g.DrawLine(myPen, 960, 560, 960, 520);    
           }

           pt.X = 10;
           pt.Y = 10;

           g.DrawString(letter, new Font(FontFamily.GenericSansSerif, emSize, FontStyle.Regular), new SolidBrush(Color.Green), pt);            
       }
   }
}