谁能告诉我 这里面的 iBoxWidh 是哪里来的？ 还有运行了这个之后 左上角的ICO也不见了 哪个高手能给帮帮忙啊！

Question

#region 改变窗口样式        #if !DEBUG        [DllImport ("User32.dll")]
        private static extern IntPtr GetWindowDC(IntPtr hwnd);        [DllImport ("User32.dll")]
        private static extern int ReleaseDC(IntPtr hwnd, IntPtr hdc);
        protected  override  void WndProc(ref Message m)        ...{
    
                base.WndProc(ref m);
         
                switch(m.Msg)        
                ...{                    case 0x86://WM_NCACTIVATE                        goto case 0x85;                    case 0x85://WM_NCPAINT
                    ...{
                        
          
                        IntPtr hDC = GetWindowDC(m.HWnd);
     
                        //把DC转换为.NET的Graphics就可以很方便地使用Framework提供的绘图功能了
                        Graphics gs = Graphics.FromHdc(hDC);                        处理色彩#region 处理色彩                        int ibox = 1;                        if (this.MaximizeBox) ibox ++;
                        if (this.MinimizeBox) ibox ++;                        //得到相关背景图片
                        Image imgpm =  Image.FromFile( Application.StartupPath+ @"Main.bmp");                     
                        
　　                    //gs.DrawImage(imgbg,3,0,this.Width - (ibox * iBoxWidh),SystemInformation.CaptionHeight + 2);    //显示背景图片                        //标题栏显示背景颜色
                        int xPos    = this.Width    -    iBoxWidh * ibox - 2 - ibox*3;                         Rectangle excludeRect;
                        //标题栏中不需要填充的位置
                        for(int i=0;i<ibox;i++)
                        ...{
                            if( i>0)
                            ...{
                                xPos = xPos +  iBoxWidh + 2;
                            }
                             
                              excludeRect = new Rectangle(xPos, 5, iBoxWidh, iBoxWidh+1);
                            gs.ExcludeClip(excludeRect);
                        }
                        
                    
                        //背景区域
                        Rectangle rBackground = new Rectangle(0,0,this.Width,SystemInformation.CaptionHeight+3);
                        //背景颜色 上下渐变
                        System.Drawing.Drawing2D.LinearGradientBrush bBackground 
                            = new System.Drawing.Drawing2D.LinearGradientBrush(rBackground, Color.FromArgb(100,145,175), Color.FromArgb(45,80,120),LinearGradientMode.Vertical);
 
                        //标题栏填充背景颜色
                        gs.FillRectangle(bBackground,rBackground );
                        //显示图标文件
　　                    gs.DrawImage(imgpm,4,4,24,24);                            #endregion
                        StringFormat strFmt = new StringFormat();                        //strFmt.Alignment = StringAlignment.Center;
                        //strFmt.LineAlignment = StringAlignment.Center;                        //gs.DrawString(this.Text, this.Font, Brushes.BlanchedAlmond, m_rect, strFmt);
                        //设置标题字体
                        Font drawFont = new Font("宋体", 10,System.Drawing.FontStyle.Bold);
                        //设置标题颜色
                        SolidBrush drawBrush = new SolidBrush(Color.White);
                     
                        //重画标题
                        gs.DrawString(this.Text, drawFont, drawBrush, 30,8);                         gs.Dispose();                        //释放GDI资源                        ReleaseDC(m.HWnd, hDC);
                         
                        break;                    }                    case 0xA1://WM_NCLBUTTONDOWN
                    ...{                        Point mousePoint = new Point((int)m.LParam);                        mousePoint.Offset(-this.Left, -this.Top);                        //                    if(m_rect.Contains(mousePoint))
                        //                    {
                        //
                        //                        MessageBox.Show("hello");
                        //
                        //                    }                        break;                    }
     
                }
             }
         
        #endif        #endregion