//find and store latitude string

            int indexStart = rawDataReceived.IndexOf("z");

            int indexEnd = rawDataReceived.IndexOf("N/");

            latitude = rawDataReceived.Substring(indexStart + 1, indexEnd - indexStart - 1);

            //find and store longitude string

            indexStart = rawDataReceived.IndexOf("N/");

            indexEnd = rawDataReceived.IndexOf("WO");

            longitude = rawDataReceived.Substring(indexStart + 2, indexEnd - indexStart - 2);

            //remove APRS overhead from string

            //place each datum in its own variable

            string[] dataTransmission;

            dataTransmission = transmissionCommentField.Split('~');

            //variables for processing datums

            string typeCode;

            string data;

            string csvData = "";

            string testString = "";

            //loop through all datums in the transmission and send them to the chart builder

            {

                {

                    firstTransmissionDatum = true;

                }

                else

                {

                    firstTransmissionDatum = false;

                }

                //remove unwanted characters

                dataTransmission[i] = dataTransmission[i].Trim();

                //zero not always trasmitted properly so add '0.0' to any transmission with no data

        float conv_coords(float in_coords)

        {

            //Initialize the location.

            float f = in_coords;

            // Get the first two digits by turning f into an integer, then doing an integer divide by 100;

            // firsttowdigits should be 77 at this point.

            int firsttwodigits = ((int)f) / 100;                               //This assumes that f < 10000.

            float nexttwodigits = f - (float)(firsttwodigits * 100);

            float theFinalAnswer = (float)(firsttwodigits + nexttwodigits / 60.0);

            return theFinalAnswer;

        }

        // add marker from an APRS transmission - MDKEdit

        private void addTrackerMarker(string lat, string lng)

        {

            double latitude = double.Parse(lat), longitude = double.Parse(lng);

            PointLatLng APRSloc = new PointLatLng();

            APRSloc.Lat = conv_coords((float)latitude);

            APRSloc.Lng = conv_coords((float)longitude)*-1;

            GMarkerGoogle m = new GMarkerGoogle(APRSloc, GMarkerGoogleType.blue_small);

            m.ToolTipText = "Tracker";

                    else if (dataString.StartsWith("2")) //Camera Module

                    {

                        tboxCameraBatteryLevel.Text = dataString.Substring(1);

                        tboxCameraBatteryLevel.BackColor = Color.Chartreuse;

                    }

                }

                else if (dataType.Equals("i")) //Info Message

                {

                    AddTextDelegate("Info: " + data + "\r\n");

                }

                ///MASTER MODULE DATA TYPES

                {

                    //TODO: check math and decimal placement

                    latitude += data.ToString();

                    tboxMasterLatitude.Text = latitude;

                    tboxMasterLatitude.BackColor = Color.Chartreuse;

                }

                {

                    //TODO: check math and decimal placement

                    longitude += data.ToString();

                    tboxMasterLongitude.Text = longitude;

                    tboxMasterLongitude.BackColor = Color.Chartreuse;

                }

                else if (dataType.Equals("h"))  //HDOP

                {

                    tboxMasterHDOP.Text = data.ToString();

                    tboxMasterHDOP.BackColor = Color.Chartreuse;

                }

                else if (dataType.Equals("v"))  //Velocity

using System.IO.Ports;

using System.Threading;

namespace Demo.WindowsForms

{

   class Program

   {

      /// <summary>

      /// The main entry point for the application.

      /// </summary>

      /// 

       // Instantiate the communications port 

       static MainForm windowGUI;

      [STAThread]

      static void Main()

      {

          Application.SetCompatibleTextRenderingDefault(false);

          var program = new Program();

          windowGUI = new MainForm();

          program.SerialInitialize();

         Application.EnableVisualStyles();

         Application.Run(windowGUI);