怎么获取坐标值

如何获取坐标值
我想通过鼠标移动获取当前的坐标值，并显示在文本框中，但是我写的程序不能实现，请各位帮帮小弟，谢谢了。
public Point StartPt, EndPt;
  public Form1()
  {
  InitializeComponent();
  }

  private void Form1_Load(object sender, EventArgs e)
  {

  }
  private void Form1_MouseDown(object sender, MouseEventArgs e)
  {
  StartPt.X = e.X;
  StartPt.Y = e.Y;
  this.textBox1.Text = Convert.ToString(StartPt.X);
  this.textBox2.Text = Convert.ToString(StartPt.Y);

  }

  private void Form1_MouseMove(object sender, MouseEventArgs e)
  {
  EndPt.X = e.X;
  EndPt.Y = e.Y;
  this.textBox1.Text =Convert.ToString( EndPt.X);
  this.textBox2.Text =Convert.ToString( EndPt.Y);
  }


[解决办法]

C# code

private void Form1_MouseMove(object sender, MouseEventArgs e)  {  EndPt.X = e.X;  EndPt.Y = e.Y;  this.textBox1.Text =Convert.ToString( EndPt.X);  this.textBox2.Text =Convert.ToString( EndPt.Y);  [color=#FF0000]this.textBox1.Refresh();  this.textBox2.Refresh();[/color]  }
[解决办法]
首要条件，当前焦点在FORM上
[解决办法]
  试过了，不用那么麻烦，， 
    private void Form1_MouseMove(object sender, MouseEventArgs e)
       {
           textBox1.Text = "X="+MousePosition.X ;
           textBox1.Text = "Y="+MousePosition.Y ;
       }
[解决办法]
探讨

当前焦点在Form上是什么意思啊，大侠能说的清楚点不，谢谢了。

[解决办法]
 [code=C#][/code]
private void Form1_MouseMove(object sender, MouseEventArgs e)
 {
   textBox1.Text ="("+e.X.ToString()+","+e.Y.ToString()+")";  
 }