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  this.DoubleBuffered = true;//ÉèÖñ¾´°Ìå
            SetStyle(ControlStyles.UserPaint, true);
            SetStyle(ControlStyles.AllPaintingInWmPaint, true); // ½ûÖ¹²Á³ý±³¾°.
            SetStyle(ControlStyles.DoubleBuffer, true); // Ë«»º³å
            //SetStyle(ControlStyles.DoubleBuffer | ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
            //UpdateStyles();

תÔØÓÚ:https://www.cnblogs.com/EthanSun/p/3237615.html