How to use this program to take picture in some time interval?

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Xml;
using TSTExplorerDesktop;
namespace TSTExplorer
{
    //<summary>
    //This class takes a snapshot from any or all attached webcams
    //</summary>

    
    class CapturePicture
    {
        XmlDocument lpicxmldoc = new XmlDocument();
        ArrayList Devices = new ArrayList();
        
            const short WM_CAP = 0x400;
            const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10;
            const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11;
            const int WM_CAP_EDIT_COPY = WM_CAP + 30;
            const int WS_CHILD = 0x40000000;
            const int WS_VISIBLE = 0x10000000;
            
            int Height = 480;
            int Width = 640;

       

        //This function enables send the specified message to a window or windows
        [DllImport("user32", EntryPoint = "SendMessageA")]
        protected static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] object lParam);
        //This function enables create a  window child with so that you can display it in a picturebox for example
        [DllImport("avicap32.dll")]
        protected static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszWindowName,int dwStyle, int x, int y, int nWidth, int nHeight, int hWndParent, int nID);


        //This function enables enumerate the web cam devices
        [DllImport("avicap32.dll")]
        protected static extern bool capGetDriverDescriptionA(short wDriverIndex, [MarshalAs(UnmanagedType.VBByRefStr)]ref String lpszName,int cbName, [MarshalAs(UnmanagedType.VBByRefStr)] ref String lpszVer, int cbVer);
        

        
        //public string OutputPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
        //public string FilenamePrefix = "snapshot";

        public void  New()
            {
	            mLoadDeviceList();
            }
        public void mLoadDeviceList()
        {
            
            string lsName = String.Empty.PadRight(100);
            string lsVers = String.Empty.PadRight(100);
            bool lbReturn = false;
            short x = 0;
          
            // Load name of all avialable devices into the lstDevices .
            do
            {
                //   Get Driver name and version
                lbReturn = capGetDriverDescriptionA(x , ref lsName, 100, ref lsVers, 100);
                // If there was a device add device name to the list
                if (lbReturn)
                   
                    Devices.Add(lsName.Trim());
                
                x += 1;
            } while (!(lbReturn == false));
        }
        public void TakePicture()
        {
            int i;

            for (i = 0; i <= this.Devices.Count - 1; i++)
            {
                string lsFilename = Login.logdir + "\\images\\" + Login.luserid + "_" + BuildLog.curtime + ".png";  //Syste.io.Path.Combine(OutputPath, this.FilenamePrefix + i + ".jpg");
                TakePicture(i, lsFilename);
            }


        }
        public void TakePicture(int iDevice)
        {
            string filename = Login.logdir + "\\images\\" + Login.luserid  + "_" + BuildLog.curtime + ".png" ;
            //fnbuildFolderStructure("images");
            //<small></small>buildxmlforPicture(System.IO.Path.GetDirectoryName(Login.logdir), filename, Login.luserid + "_" + BuildLog.curtime + ".png");
            mLoadDeviceList();
             this.TakePicture(iDevice, filename);
        }
        public void TakePicture(int iDevice, string filename)
        {
            string tmpiDevice = Convert.ToString(iDevice);
            int lhHwnd = 0;
            int i;
            // Handle to preview window

            // Create a form to play with
            using (System.Windows.Forms.Form loWindow = new System.Windows.Forms.Form())
            {

                // Create capture window
                lhHwnd = capCreateCaptureWindowA(ref tmpiDevice, WS_VISIBLE | WS_CHILD, 0, 0, this.Width, this.Height, loWindow.Handle.ToInt32(), 0);
                
                // Hook up the device
                SendMessage(lhHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0);
                // Allow the webcam apeture to let enough light in
                for (i = 1; i <= 10; i++)
                {
                    Application.DoEvents();
                }

                // Copy image to clipboard
                SendMessage(lhHwnd, WM_CAP_EDIT_COPY, 0, 0);

                // Get image from clipboard and convert it to a bitmap
                IDataObject loData = Clipboard.GetDataObject();
                if (loData.GetDataPresent(typeof(System.Drawing.Bitmap)))
                {
                    using (Image loBitmap = (Image)loData.GetData(typeof(System.Drawing.Bitmap)))
                    {
                        loBitmap.Save(filename,System.Drawing.Imaging.ImageFormat.Png );
                    }
                }

                //SendMessage(lhHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0);

            }
        }


        


        

    }
    
}

IDataObject loData = Clipboard.GetDataObject();