C# splitContainer 控件的简单问题

[低调的感觉]

我现在把 splitContainer1 控件分成了
1 2 两个区（一行两列）
由于在程序运行的时候
1 2 这两个区是可以随意改变的
我怎么得到 2 这个区左上角相对于显示器左上角的左边

[wartim]

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

namespace WindowsApplication22
{
    public partial class Form1 : Form
    {
        Point P1, P2;

        public Form1()
        {
            InitializeComponent();
        }

        private void splitContainer1_Panel1_Resize(object sender, EventArgs e)
        {
            P1 = splitContainer1.Panel1.PointToScreen(new Point(0, 0));
            this.Text = "panel1 - (x:" + P1.X + ",y:" + P1.Y + ") panel2 - (x:" + P2.X + ",y:" + P2.Y+")"; 
        }

        private void splitContainer1_Panel2_Resize(object sender, EventArgs e)
        {
            P2 = splitContainer1.Panel2.PointToScreen(new Point(0, 0));
            this.Text = "panel1 - (x:" + P1.X + ",y:" + P1.Y + ") panel2 - (x:" + P2.X + ",y:" + P2.Y + ")";
        }

        private void Form1_Move(object sender, EventArgs e)
        {
            P1 = splitContainer1.Panel1.PointToScreen(new Point(0, 0));
            P2 = splitContainer1.Panel2.PointToScreen(new Point(0, 0));
            this.Text = "panel1 - (x:" + P1.X + ",y:" + P1.Y + ") panel2 - (x:" + P2.X + ",y:" + P2.Y + ")"; 
        }
    }
}

[net5i]

建议用：
int left = this.splitContainer1.PointToScreen(new Point(this.splitContainer1.Panel2.Left, this.splitContainer1.Panel2.Top)).X;

也可以用(这种方法可能有些误差，因为控件边界宽度问题)：
int left = 0;
Control parentControl = this.splitContainer1.Panel2;
while (parentControl != null)
{
left += parentControl.Left;
parentControl = parentControl.Parent;
}