想利用Windows的图形图象为Web所用．

using System;
using System.Drawing;
using System.Windows.Forms;

public class Clr:Form
{
 Button b1 = new Button();
 TextBox tb = new TextBox();
 ColorDialog clg = new ColorDialog();

 public Clr()
 {
  b1.Click += new EventHandler(b1_click);
  b1.Text = "选择颜色";
  tb.Location = new Point(50,50);
  this.Controls.Add(b1);
  this.Controls.Add(tb);
 }

 public void b1_click(object sender, EventArgs e)
 {
  clg.ShowDialog();
  tb.BackColor = clg.Color;
 }

 public static void Main()
 {
  Application.Run(new Clr());
 }
}