关于画图位置的问题

[qingqing08]

请问下我要在一个form下的tabcontrol中画图
请问下那初始点怎么取呢？

private void button6_Click(object sender, EventArgs e)
        {
            Graphics graphics = this.CreateGraphics();
            Pen myPen = new Pen(Color.Black, 1);
            int beginX =tabControl1.Location.X  +50;
            int beginY = tabControl1.Location.Y + 65;
            //int height = 35;
            //int width = 50;
            Point pointX1 = new Point(beginX, beginY);
            Point pointY1 = new Point(beginX + 210, beginY);
            Point pointX2 = new Point(beginX, beginY - 45);
            Point pointY2 = new Point(beginX, beginY + 45);
            graphics.DrawLine(myPen, pointX1, pointY1);
            graphics.DrawLine(myPen, pointX2, pointY2);
            
        }

按上面的代码就是把图画在form上，被tabcontrol挡住看不见

[北京的雾霾天]

至少应该使用：Graphics graphics = this.tabControl.CreateGraphics();
但TabControl有一个TabControl.DrawMode = TabDrawMode.OwnerDrawFixed;可以在DrawItem事件里绘制。