how to create window application dll to be used in web application

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Drawing.Drawing2D;
using System.Drawing.Design;
using System.Threading;
using System.Drawing.Imaging;
using System.Configuration;
using System.Xml;
using InfoSoftGlobal;

namespace GraphCapture
{
    public partial class Form1 : UserControl 
    {
        public Form1()
        {
            InitializeComponent();
        }
        public string filePath ;
        protected void SwfToImage()
        {
          

            Screen screen = Screen.PrimaryScreen;
           
         
            Rectangle bounds = new Rectangle(axShockwaveFlash1.Location, axShockwaveFlash1.Size);
            using (Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height))
            {
                using (Graphics g = Graphics.FromImage(bitmap))
                {
                    g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                    g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
                }

                bitmap.Save(filePath + "/FCF_Column3D.Jpeg", ImageFormat.Jpeg);
            }

        }

        public void GetGraph(XmlDocument strXml,string fPath)
        {
            string appPath = "file:///" + Application.StartupPath + "\\FusionCharts\\FCF_Column3D.swf";
            appPath = appPath.Replace("\\", "/");
            filePath = fPath;
            FileStream fs = new FileStream(filePath + "\\FCF_Column3D.Xml", FileMode.Open, FileAccess.Read);
            strXml.Load(fs);
            //string strChart = filePath + @"?dataXML=" + strXml.InnerXml.Replace("\"","'")  + "®isterwithjs=1";
            //string ChartXML = appPath + strChart;
            string ChartXML = appPath + @"?dataXML=" + strXml.InnerXml.Replace("\"", "'").Replace("#", "") + "®isterwithjs=1";


        
            string XML = ChartXML;

            axShockwaveFlash1.Movie = XML;
            timer1.Start(); 


        }
        
        private void Form1_Load(object sender, EventArgs e)
        {
          

        }

       
        private void timer1_Tick(object sender, EventArgs e)
        {
            SwfToImage();
            timer1.Stop();
           
        }
    }
}