/// <summary>
        /// 重绘非工作区 
        /// </summary>
        private void NCPaint()
        {
            IntPtr wdc = Common.GetWindowDC(this.Handle);// Graphics.FromHwnd(this.Handle);

            Graphics g = Graphics.FromHdc(wdc);
            try
            {
                DarwRegion(g);
            }
            catch
            { }
            Common.ReleaseDC(this.Handle, wdc);
        }

        private void DarwRegion(Graphics gs)
        {
            if (this.FormBorderStyle == FormBorderStyle.None)
                return;

            using (Bitmap img = new Bitmap(this.Bounds.Width, this.Bounds.Height))
            {

                Graphics g = Graphics.FromImage(img);

                if (mouseMove == MouseMose.None)
                {
                    GraphicsPath drawRect = RectX(new Rectangle(0, 0, this.Bounds.Width, this.Bounds.Height), Arc);

                    //绘制渐变色 
                    Rectangle rect = new Rectangle(0, 0, this.Bounds.Width, this.Bounds.Height);
                    LinearGradientBrush brush = new LinearGradientBrush(rect, this._colorA, this._colorB, 90);
                    drawRect.AddRectangle(new Rectangle(BorderWidth, HeadHeight, this.ClientSize.Width, this.ClientSize.Height));
                    g.FillPath(brush, drawRect);


                    //绘制图标Icon
                    if (ShowIcon)
                        g.DrawIcon(this.Icon, new Rectangle(BorderWidth + 5, (HeadHeight - 16) / 2, 16, 16));

                    //绘制标题 

                    StringFormat sf = new StringFormat();
                    sf.LineAlignment = StringAlignment.Center;
                    //求标题栏的区域
                    ToolTitle = new Rectangle(BorderWidth + 23, 0, this.Bounds.Width, HeadHeight);
                    g.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), ToolTitle, sf);

                    //绘制最大最小关闭按钮  
                    //g.DrawImage(butClose, ButClose);
                    //g.DrawImage(butMax, ButMax);
                    //g.DrawImage(butMin, ButMin);

                    DrawButton(g);

                    //绘制边框  
                    g.SmoothingMode = SmoothingMode.HighQuality; //高质量
                    drawRect = RectX(new Rectangle(1, 1, this.Bounds.Width - 4, this.Bounds.Height - 4), Arc - 1);
                    g.DrawPath(new Pen(Color.FromArgb(100, Color.White), 1), drawRect);//绘制内边框

                    drawRect = RectX(new Rectangle(0, 0, this.Bounds.Width - 2, this.Bounds.Height - 2), Arc - 1);
                    g.DrawPath(new Pen(SolidColor, 1), drawRect);//绘制外边框 
                }
                else
                {
                    int i = this.Bounds.Width - 3, h = 1;
                    foreach (ToolButton a in ListButton)
                    {
                        if (!a.Start)
                            continue;
                        i = i - a.Size.Width;
                        Rectangle rect = new Rectangle(new Point(i, h), a.Size);
                        if (a == _newbutton)
                        {
                            g.FillRectangle(new SolidBrush(ColorA), rect);
                            g.DrawImage(a.Move, rect);
                        }
                        else
                            if (a == _oldbutton)
                            {
                                g.FillRectangle(new SolidBrush(ColorA), rect);
                                g.DrawImage(a.Default, rect);
                            }
                    }

                }
                gs.DrawImage(img, Point.Empty);
                
            }

          

        }

/// <summary>
        /// 非客户区刷新 
        /// </summary>
        private void NCUpdate()
        {
            Common.SendMessage(this.Handle, (int)Msg.WM_NCPAINT, 0, 0);
        }

switch (m.Msg)
            {

                case (int)Msg.WM_NCCALCSIZE:
                    BorderWidth = (this.Bounds.Width - this.ClientSize.Width) / 2;
                    HeadHeight = this.Bounds.Height - this.ClientSize.Height - BorderWidth;
                    mouseMove = MouseMose.None;
                    // NCPaint();
                    base.WndProc(ref m);
                    break;
                case (int)Msg.WM_NCACTIVATE:
                    base.WndProc(ref m);
                    mouseMove = MouseMose.None;
                    NCUpdate();
                    break;
                case (int)Msg.WM_NCPAINT:
                    NCPaint();
                    break;
                case (int)Msg.WM_NCLBUTTONDOWN:
                    if (GetMouseButton() == null)
                    {
                        base.WndProc(ref m);
                        // Console.WriteLine(1);
                    }
                    break;
                case (int)Msg.WM_NCLBUTTONUP:
                    ToolButton but = GetMouseButton();
                    if (but != null)
                    {
                        but.OnClick();
                    }
                    base.WndProc(ref m);
                    break;
                case (int)Msg.WM_NCMOUSEMOVE:
                    NewButton = GetMouseButton();
                    base.WndProc(ref m);
                    break;
                case (int)Msg.WM_ERASEBKGND:
                    base.WndProc(ref m);
                    NCPaint();
                    mouseMove = MouseMose.None;
                    NCUpdate();
                  
                    break;

                
                default:
                    base.WndProc(ref m);
                    break;
            }