tabControl1.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed;
            ItemTabControl.DrawItem += new System.Windows.Forms.DrawItemEventHandler(ItemTabControl_DrawItem);

        private void tabControl1_DrawItem(object sender, DrawItemEventArgs e)
        {
            //標簽默認文字顏色
            SolidBrush DefaultFrontBrush = new SolidBrush(Color.Black);

            //改變的標簽背景顏色
            SolidBrush BackBrush = new SolidBrush(Color.FromArgb(255, 0, 0));
            //標簽默認背景顏色
            SolidBrush BackBrushDefault = new SolidBrush(Color.Transparent);

            //標簽文字，選中的標簽文字加粗
            Font font = new Font("宋體", 9);
            Font fontbold = new Font("宋體", 9, FontStyle.Bold);

            //設置文字對齊方式
            StringFormat StringF = new StringFormat();
            StringF.Alignment = StringAlignment.Center;
            StringF.LineAlignment = StringAlignment.Center;
            
            for (int i = 0; i < MainTabRes.Count; i++)
            {
                //獲取標簽頭工作區域
                Rectangle Rec = tabControl1.GetTabRect(i);
                string text = tabControl1.TabPages[i].Text;
                if (MainTabRes[i] == false)//MainTabRes指示要改變背景色的標簽索引，List<bool> MainTabRes = new List<bool>();
                {
                    e.Graphics.FillRectangle(BackBrush, Rec);
                }
                else
                {
                    e.Graphics.FillRectangle(BackBrushDefault, Rec);
                }
                if (i == tabControl1.SelectedIndex)
                {
                    //繪制標簽頭文字
                    e.Graphics.DrawString(text, fontbold, DefaultFrontBrush, Rec, StringF);
                }
                else
                {
                    e.Graphics.DrawString(text, font, DefaultFrontBrush, Rec, StringF);
                }
            }
        }