using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace qqqqq
{
    public partial class Form1 : Form
    {
        public Form1()
            : base()
        {
            InitializeComponent();
        }
        private
 
 Icon icon = null;
        int PageMaxIndex = 0;
        private void button1_Click(object sender, System.EventArgs e)
        {
            PageMaxIndex++;
            tabControl1.TabPages.Add(new TabPage("ABC-" + PageMaxIndex));

        }

        //關閉區域的寬高
        const int CLOSE_SIZE = 15;
        //重畫
 

        private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
        {
            Graphics g = e.Graphics;
            using (Pen p = new Pen(this.ForeColor))
            {
                Rectangle myTabRect = tabControl1.GetTabRect(e.Index);
                //把字寫上
 

                g.DrawString(tabControl1.TabPages[e.Index].Text
                , this.Font
                , SystemBrushes.ControlText
                , myTabRect.X + 2, myTabRect.Y + 2);
                //模擬繪製一個區域表示關閉的的地方（是一個紅色的方塊區域）
                //當然大多時候畫一個圖就可以了 12*12的
                myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                myTabRect.Width = CLOSE_SIZE;
                myTabRect.Height = CLOSE_SIZE;
                //g.DrawRectangle(p, myTabRect);
                icon = qqqqq.Properties.Resources._2;
                g.DrawIcon(icon, myTabRect);

            }

        }
        private void tabControl1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {

            if (e.Button == MouseButtons.Left)
            {
                int x = e.X, y = e.Y;
                //計算關閉區域
                Rectangle myTabRect = tabControl1.GetTabRect(tabControl1.SelectedIndex);

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

                //如果滑鼠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)
                {
                    tabControl1.TabPages.Remove(tabControl1.SelectedTab);
                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //設定若干屬性
            tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;
            tabControl1.Padding = new System.Drawing.Point(15, 0);
            tabControl1.DrawItem += new DrawItemEventHandler(tabControl1_DrawItem);
            tabControl1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.tabControl1_MouseDown);
        }

        private void tabPage1_Click(object sender, EventArgs e)
        {

        }
    }
}

上面是百度下就能出來的東西，接下來一些注意點
1.程式碼中出現了Resources._2，是這樣新增進去的就是新增一個關閉的圖片
2.操蛋的是，很多時候，程式碼一模一樣都不能執行，這時候是因為Form1_Load是你手動輸入的，你需要在vs設計介面雙擊生成，這樣才能正常執行