TabControl tab绘制关闭按钮

  const int CLOSE_SIZE = 15;        //tabPage标签图片         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();             //绘制的方式OwnerDrawFixed表示由窗体绘制大小也一样             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);         }        //绘制“Ｘ”号即关闭按钮         private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e)        {            try            {                Rectangle myTabRect = this.MainTabControl.GetTabRect(e.Index);                //先添加TabPage属性                    e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2);                //再画一个矩形框                 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);                }                //画关闭符号                 using (Pen objpen = new Pen(Color.Black))                {                    ////=============================================                     //自己画X                     ////"\"线                     //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);                     ////"/"线                     //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);                     ////=============================================                     //使用图片                     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)            { }        }        //关闭按钮功能         private void MainTabControl_MouseDown(object sender, MouseEventArgs e)        {            if (e.Button == MouseButtons.Left)            {                int x = e.X, y = e.Y;                //计算关闭区域                    Rectangle myTabRect = this.MainTabControl.GetTabRect(this.MainTabControl.SelectedIndex);                myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);                myTabRect.Width = CLOSE_SIZE;                myTabRect.Height = CLOSE_SIZE;                //如果鼠标在区域内就关闭选项卡                    bool isClose = x > myTabRect.X && x < myTabRect.Right && y > myTabRect.Y && y < myTabRect.Bottom;                if (isClose == true)                {                    this.MainTabControl.TabPages.Remove(this.MainTabControl.SelectedTab);                }            }        }