自定义带关闭按钮的TabControl实现与代码

选项卡，控件上面带关闭的   其实都是用从绘方式画上去的   
  然后监测点击位置   如果在右上的X关闭的区域就关闭了   
    
  以前写的演示，不过没什么用了现在流行双击关闭选项卡简单还   
    
  private   void   TabDraw_Load(object   sender,   System.EventArgs   e)   
  {   
  //设置若干属性   
  tabControl1.DrawMode   =   TabDrawMode.OwnerDrawFixed;   
  tabControl1.Padding   =   new   System.Drawing.Point(CLOSE_SIZE,   CLOSE_SIZE);   
  tabControl1.DrawItem+=new   DrawItemEventHandler(tabControl1_DrawItem);   
  tabControl1.MouseDown   +=   new   System.Windows.Forms.MouseEventHandler(this.tabControl1_MouseDown);   
  }   
    
  int   PageMaxIndex=0;   
  private   void   button1_Click(object   sender,   System.EventArgs   e)   
  {   
  PageMaxIndex++;   
  tabControl1.TabPages.Add(new   TabPage("ABC-"   +   PageMaxIndex));   
    
  }   
    
  //关闭区域的宽高   
  const   int   CLOSE_SIZE   =   12;   
  //重画   
  private   void   tabControl1_DrawItem(object   sender,   System.Windows.Forms.DrawItemEventArgs   e)   
  {   
  //