TabControl tab繪製關閉按鈕

  const int CLOSE_SIZE = 15;
        //tabPage標籤圖片 
        Bitmap image = new Bitmap(@"C:\Documents and Settings\Administrator\桌面\1.gif"); 

        private void TabTest_Load(object sender, EventArgs e)
        {
            //清空控件 
            //this.MainTabControl.TabPages.Clear(); 
            //繪製的方式OwnerDrawFixed表示由窗體繪製大小也一樣 
            this.MainTabControl.DrawMode = TabDrawMode.OwnerDrawFixed; 
            this.MainTabControl.Padding = new System.Drawing.Point(CLOSE_SIZE, CLOSE_SIZE); 
            this.MainTabControl.DrawItem += new DrawItemEventHandler(this.MainTabControl_DrawItem); 
            this.MainTabControl.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MainTabControl_MouseDown); 
        }

        //繪製“Ｘ”號即關閉按鈕 
        private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e)
        {
            try
            {
                Rectangle myTabRect = this.MainTabControl.GetTabRect(e.Index);

                //先添加TabPage屬性    
                e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2);

                //再畫一個矩形框 
                using (Pen p = new Pen(Color.White))
                {
                    myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                    myTabRect.Width = CLOSE_SIZE;
                    myTabRect.Height = CLOSE_SIZE;
                    e.Graphics.DrawRectangle(p, myTabRect);
                }

                //填充矩形框 
                Color recColor = e.State == DrawItemState.Selected ? Color.White : Color.White;
                using (Brush b = new SolidBrush(recColor))
                {
                    e.Graphics.FillRectangle(b, myTabRect);
                }

                //畫關閉符號 
                using (Pen objpen = new Pen(Color.Black))
                {
                    ////============================================= 
                    //自己畫X 
                    ////"\"線 
                    //Point p1 = new Point(myTabRect.X + 3, myTabRect.Y + 3); 
                    //Point p2 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + myTabRect.Height - 3); 
                    //e.Graphics.DrawLine(objpen, p1, p2); 
                    ////"/"線 
                    //Point p3 = new Point(myTabRect.X + 3, myTabRect.Y + myTabRect.Height - 3); 
                    //Point p4 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + 3); 
                    //e.Graphics.DrawLine(objpen, p3, p4); 

                    ////============================================= 
                    //使用圖片 
                    Bitmap bt = new Bitmap(image);
                    Point p5 = new Point(myTabRect.X, 4);
                    e.Graphics.DrawImage(bt, p5);
                    //e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, objpen.Brush, p5); 
                }
                e.Graphics.Dispose();
            }
            catch (Exception)
            { }
        }

        //關閉按鈕功能 
        private void MainTabControl_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                int x = e.X, y = e.Y;
                //計算關閉區域    
                Rectangle myTabRect = this.MainTabControl.GetTabRect(this.MainTabControl.SelectedIndex);

                myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                myTabRect.Width = CLOSE_SIZE;
                myTabRect.Height = CLOSE_SIZE;

                //如果鼠標在區域內就關閉選項卡    
                bool isClose = x > myTabRect.X && x < myTabRect.Right && y > myTabRect.Y && y < myTabRect.Bottom;
                if (isClose == true)
                {
                    this.MainTabControl.TabPages.Remove(this.MainTabControl.SelectedTab);
                }
            }
        }