请问下QQ主面板应该如何实现？

我使用过treeview 点击树节点(好友分组)的时候出现panel(好友列表) 后来panel会遮住其他的树节点
然后改成用label 点击label(好友分组)的时候出现panel(好友列表) 然后把没点到的label坐标下移到panel后面
现在老是出现label位移的错误,要么少了要么多了
panel的位移没有错...我的思路代码如下//新建个label数组
Label[] lblgroup = new Label[15];
//最开始的分组出现位置
Point plp = new Point(0,25);//在窗体读取的时候动态生成15个存分组信息的label
        private void MainForm_Load(object sender, EventArgs e)
        {
            for (int i = 0; i < 15; i++)
            {
                lblgroup[i] = new Label();
                lblgroup[i].AutoSize = false;
                lblgroup[i].Text = i.ToString();
                lblgroup[i].Location = pgp;
                lblgroup[i].Height = 10;
                lblgroup[i].BackColor =Color.Transparent;
                //这是最外层装label的panel
                lblgroup[i].Parent = pnlSuspendShowInfo;
                lblgroup[i].Tag = i;
                //给所有label共用一个点击事件
                lblgroup[i].Click += new System.EventHandler(this.lblLever_Click);
                pgp.Y += 23;
            }
        }
        //当label被点击的时候触发
        private void lblLever_Click(object sender, EventArgs e)
        {
                //获取当前点击的label
                Label lbl = (Label)sender;
                //判断panel将要在哪个label下出现
                for (int i = 0; i < Convert.ToInt32(lbl.Tag); i++)
                {
                    plp.Y += 20;
                }
                pnlSuspendShowInfo.Width = 285;
                pnlSuspendShowInfo.Height = 365;
                //循环创建10个panel(好友信息)
                for (int i = 0; i < 10; i++)
                {
                    Panel pl = new Panel();
                    pl.Parent = pnlSuspendShowInfo;
                    pl.BackColor = Color.Red;
                    pl.Width = 260;
                    pl.Height = 20;
                    pl.Location = plp;                    PictureBox pb = new PictureBox();
                    pb.Parent = pl;
                    pb.Width = 20;
                    pb.Height = 20;
                    pb.Location = pbp;
                    pb.BackgroundImage = img2.Images[i];                    Label lb = new Label();
                    lb.Parent = pl;
                    lb.Width = 245;
                    lb.Height = 15;
                    lb.Location = plbp;
                    lb.Text = "桂雏菊";                    plp.Y += 22;
                }
                b = true;
                //遍历最外层panel的所有控件
                foreach (Control item in pnlSuspendShowInfo.Controls)
                {
                 //如果是label的话
                    if (item is Label)
                    {
                       //把当前点击的label下面的所有label坐标改变,上面的label不需要更改坐标
                        if (item.Text != lbl.Text&&Convert.ToInt32(item.Tag)>Convert.ToInt32(lbl.Tag))
                        {
                            for (int i = 0; i < Convert.ToInt32(item.Tag); i++)
                            {
                                item.Location = plp;
                                plp.Y += 20;
                            }
                        }
                    }
                }
            }   代码就是这样,老是错位...请各位大神帮帮忙...马上就要交作业了...
   如果有更好的方法请留下您的足迹...谢谢