ceph/src/boost/libs/math/dot_net_example/distribution_explorer/DistexForm.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.ComponentModel;
   4 using System.Data;
   5 using System.Drawing;
   6 using System.Text;
   7 using System.Windows.Forms;
   8 using System.Threading;
   9 using System.Diagnostics;
  10 using System.IO;
  11 using System.Reflection;
  12
  13 namespace distribution_explorer
  14 {
  15   /// <summary>
  16   /// Main distribution explorer.
  17   /// </summary>
  18   public partial class DistexForm : Form
  19   {
  20
  21     EventLog log = new EventLog();
  22     /// <summary>
  23     /// Main form
  24     /// </summary>
  25     public DistexForm()
  26     {
  27       if (!EventLog.SourceExists("EventLogDistex"))
  28       {
  29         EventLog.CreateEventSource("EventLogDistex", "Application");
  30       }
  31       log.Source = "EventLogDistex";
  32       log.WriteEntry("DistexForm");
  33
  34       InitializeComponent();
  35
  36       Application.DoEvents();
  37     }
  38
  39     private void Form_Load(object sender, EventArgs e)
  40     { // Load distribution & parameters names, and default values.
  41       try
  42       {
  43         // Create and show splash screen:
  44         this.Hide();
  45         distexSplash frmSplash = new distexSplash();
  46         frmSplash.Show();
  47         frmSplash.Update();
  48         // Now load our data while the splash is showing:
  49         if (boost_math.any_distribution.size() <= 0)
  50         {
  51           MessageBox.Show("Problem loading any distributions, size = " + boost_math.any_distribution.size().ToString());
  52         }
  53         for (int i = 0; i < boost_math.any_distribution.size(); ++i)
  54         {
  55           distribution.Items.Add(boost_math.any_distribution.distribution_name(i));
  56         }
  57         distribution.SelectedIndex = 0; // 1st in array, but could be any other.
  58         // All parameters are made zero by default, but updated from chosen distribution.
  59         parameter1.Text = boost_math.any_distribution.first_param_default(0).ToString();
  60         parameter2.Text = boost_math.any_distribution.second_param_default(0).ToString();
  61         parameter3.Text = boost_math.any_distribution.third_param_default(0).ToString();
  62         //
  63         // Sleep and then close splash;
  64         Thread.Sleep(3000);
  65         frmSplash.Close();
  66         this.Visible = true;
  67       }
  68       catch
  69       { //
  70         log.WriteEntry("DistexForm_load exception!");
  71         MessageBox.Show("Problem loading distributions, size = " + boost_math.any_distribution.size().ToString());
  72       }
  73     }
  74
  75     private void distribution_SelectedIndexChanged(object sender, EventArgs e)
  76     {
  77       int i = distribution.SelectedIndex; // distribution tab.
  78       parameter1Label.Text = boost_math.any_distribution.first_param_name(i);
  79       parameterLabel1.Text = boost_math.any_distribution.first_param_name(i); // properties tab.
  80       parameter2Label.Text = boost_math.any_distribution.second_param_name(i);
  81       parameter3Label.Text = boost_math.any_distribution.third_param_name(i);
  82       if (boost_math.any_distribution.first_param_name(i).Length.CompareTo(0) != 0)
  83       { // Actually all the distributions have at least one parameters,
  84         parameter1.Visible = true; // so should always be true.
  85         parameterLabel1.Visible = true;
  86       }
  87       else
  88       { // If distribution chosen has no parameter name(s) then hide.
  89         parameter1.Visible = false;
  90         parameterLabel1.Visible = false;
  91       }
  92       parameter1.Text = boost_math.any_distribution.first_param_default(i).ToString();
  93       // Update parameter default to match distribution.
  94       if (boost_math.any_distribution.second_param_name(i).Length.CompareTo(0) != 0)
  95       {
  96         parameter2.Visible = true;
  97         parameterLabel2.Visible = true;
  98         parameter2ValueLabel.Visible = true;
  99       }
 100       else
 101       { // hide
 102         parameter2.Visible = false;
 103         parameterLabel2.Visible = false;
 104         parameter2ValueLabel.Visible = false;
 105
 106       }
 107       parameter2.Text = boost_math.any_distribution.second_param_default(i).ToString();
 108       if (boost_math.any_distribution.third_param_name(i).Length.CompareTo(0) != 0)
 109       {
 110         parameter3.Visible = true;
 111         parameterLabel3.Visible = true;
 112         parameter3ValueLabel.Visible = true;
 113       }
 114       else
 115       { // hide
 116         parameter3.Visible = false;
 117         parameterLabel3.Visible = false;
 118         parameter3ValueLabel.Visible = false;
 119       }
 120       parameter3.Text = boost_math.any_distribution.third_param_default(i).ToString();
 121       // Update tool tips to show total and supported ranges.
 122       PropertiesTabPage.ToolTipText = "Shows properties and ranges of chosen distribution.";
 123     }
 124
 125     private boost_math.any_distribution dist;
 126
 127     private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
 128     { // Display a grid of pdf, cdf... values from user's random variate x value.
 129       try
 130       {
 131         if (e.ColumnIndex == 0)
 132         { // Clicked on left-most random variate x column to enter a value.
 133           int i = e.RowIndex;
 134           string s = CDF_data.Rows[i].Cells[0].Value.ToString();
 135           double x = double.Parse(s); // Get value of users random variate x.
 136           double pdf = dist.pdf(x); // Compute pdf values from x
 137           double cdf = dist.cdf(x); // & cdf
 138           double ccdf = dist.ccdf(x); // & complements.
 139           CDF_data.Rows[i].Cells[1].Value = pdf; // and display values.
 140           CDF_data.Rows[i].Cells[2].Value = cdf;
 141           CDF_data.Rows[i].Cells[3].Value = ccdf;
 142         }
 143       }
 144       catch (SystemException se)
 145       {
 146           MessageBox.Show("Error in random variable value: " + se.Message, "Calculation Error");
 147       }
 148     }
 149
 150     private void tabPage2_Enter(object sender, EventArgs e)
 151     { // Properties tab shows distribution's mean, mode, median...
 152       try
 153       { // Show chosen distribution name, and parameter names & values.
 154         int i = distribution.SelectedIndex;
 155         distributionValueLabel.Text = boost_math.any_distribution.distribution_name(i).ToString();
 156         parameterLabel1.Text = boost_math.any_distribution.first_param_name(i).ToString();
 157         parameter1ValueLabel.Text = double.Parse(parameter1.Text).ToString();
 158         parameterLabel2.Text = boost_math.any_distribution.second_param_name(i).ToString();
 159         parameter2ValueLabel.Text = double.Parse(parameter2.Text).ToString();
 160         parameterLabel3.Text = boost_math.any_distribution.third_param_name(i).ToString();
 161         parameter3ValueLabel.Text = double.Parse(parameter3.Text).ToString();
 162
 163         // Show computed properties of distribution.
 164         try
 165         {
 166             mean.Text = dist.mean().ToString();
 167         }
 168         catch
 169         {
 170             mean.Text = "Undefined.";
 171         }
 172         try
 173         {
 174             mode.Text = dist.mode().ToString();
 175         }
 176         catch
 177         {
 178             mode.Text = "Undefined.";
 179         }
 180         try
 181         {
 182             median.Text = dist.median().ToString();
 183         }
 184         catch
 185         {
 186             median.Text = "Undefined.";
 187         }
 188         try
 189         {
 190             variance.Text = dist.variance().ToString();
 191         }
 192         catch
 193         {
 194             variance.Text = "Undefined.";
 195         }
 196         try
 197         {
 198             standard_deviation.Text = dist.standard_deviation().ToString();
 199         }
 200         catch
 201         {
 202             standard_deviation.Text = "Undefined.";
 203         }
 204         try
 205         {
 206             skewness.Text = dist.skewness().ToString();
 207         }
 208         catch
 209         {
 210             skewness.Text = "Undefined.";
 211         }
 212         try
 213         {
 214             kurtosis.Text = dist.kurtosis().ToString();
 215         }
 216         catch
 217         {
 218             kurtosis.Text = "Undefined.";
 219         }
 220         try
 221         {
 222             kurtosis_excess.Text = dist.kurtosis_excess().ToString();
 223         }
 224         catch
 225         {
 226             kurtosis_excess.Text = "Undefined.";
 227         }
 228         try
 229         {
 230             coefficient_of_variation.Text = dist.coefficient_of_variation().ToString();
 231         }
 232         catch
 233         {
 234             coefficient_of_variation.Text = "Undefined.";
 235         }
 236
 237         rangeLowestLabel.Text = dist.lowest().ToString();
 238         rangeGreatestLabel.Text = dist.uppermost().ToString();
 239         supportLowerLabel.Text = dist.lower().ToString();
 240         supportUpperLabel.Text = dist.upper().ToString();
 241         cdfTabPage.ToolTipText = "Random variate can range from " + rangeLowestLabel.Text
 242           + " to " + rangeGreatestLabel.Text
 243           + ",\nbut is said to be supported from " + supportLowerLabel.Text
 244           + " to " + supportUpperLabel.Text
 245           + "\nWithin this supported range the PDF and CDF have values between 0 and 1,\nbut below " + supportLowerLabel.Text + " both are zero, and above "
 246           +  supportUpperLabel.Text + " both are unity";
 247       }
 248       catch (SystemException se)
 249       {
 250         MessageBox.Show(se.Message, "Calculation Error!");
 251       }
 252     }
 253
 254     private void properties_tab_Deselecting(object sender, TabControlCancelEventArgs e)
 255     {
 256       try
 257       {
 258         if (e.TabPageIndex == 0)
 259         {   // Update selected distribution object:
 260           double x = double.Parse(parameter1.Text);
 261           double y = double.Parse(parameter2.Text);
 262           double z = double.Parse(parameter3.Text);
 263           int i = distribution.SelectedIndex;
 264           dist = new boost_math.any_distribution(i, x, y, z);
 265           // Clear existing CDF data (has to be a better way?):
 266           while (CDF_data.Rows.Count > 1)
 267           {
 268             CDF_data.Rows.Remove(CDF_data.Rows[0]);
 269           }
 270           // Clear existing quantile data (has to be a better way?):
 271           while (QuantileData.Rows.Count > 1)
 272           {
 273             QuantileData.Rows.Remove(QuantileData.Rows[0]);
 274           }
 275         }
 276       }
 277       catch (SystemException se)
 278       {
 279           MessageBox.Show(se.Message +
 280               " Please check the distribution's parameters and try again.", "Distribution Error");
 281           this.propertiesTab.SelectedIndex = 0;
 282           e.Cancel = true;
 283       }
 284     }
 285
 286     private void QuantileData_CellEndEdit(object sender, DataGridViewCellEventArgs e)
 287     { // aka Risk & critical values tab.
 288       try
 289       {
 290         if (e.ColumnIndex == 0)
 291         {
 292           int i = e.RowIndex;
 293           string s = QuantileData.Rows[i].Cells[0].Value.ToString();
 294           double x = double.Parse(s);
 295           // Remember x is alpha: 1 - the probability:
 296           double lcv = dist.quantile(x);
 297           double ucv = dist.quantile_c(x);
 298           QuantileData.Rows[i].Cells[1].Value = lcv;
 299           QuantileData.Rows[i].Cells[2].Value = ucv;
 300         }
 301       }
 302       catch (SystemException se)
 303       {
 304         // TODO add some proper handling here!
 305         MessageBox.Show("Error in probability value: " + se.Message, "Calculation Error");
 306       }
 307     }
 308
 309     private void QuantileTab_Enter(object sender, EventArgs e)
 310     { // Evaluate critical values (quantiles) for pre-chosen risk level.
 311       // and then, optionally, for other user-provided risk levels.
 312       try
 313       {
 314         if (QuantileData.Rows.Count == 1)
 315         {
 316           // Add some defaults:
 317           QuantileData.Rows.Add(5); // 5 Risk levels.
 318           QuantileData.Rows[0].Cells[0].Value = "0.001"; // Risk values as text,
 319           QuantileData.Rows[0].Cells[1].Value = dist.quantile(0.001); // & as double.
 320           QuantileData.Rows[0].Cells[2].Value = dist.quantile_c(0.001);
 321           QuantileData.Rows[1].Cells[0].Value = "0.01";
 322           QuantileData.Rows[1].Cells[1].Value = dist.quantile(0.01); // 99% confidence.
 323           QuantileData.Rows[1].Cells[2].Value = dist.quantile_c(0.01);
 324           QuantileData.Rows[2].Cells[0].Value = "0.05";
 325           QuantileData.Rows[2].Cells[1].Value = dist.quantile(0.05);
 326           QuantileData.Rows[2].Cells[2].Value = dist.quantile_c(0.05);
 327           QuantileData.Rows[3].Cells[0].Value = "0.1";
 328           QuantileData.Rows[3].Cells[1].Value = dist.quantile(0.1);
 329           QuantileData.Rows[3].Cells[2].Value = dist.quantile_c(0.1);
 330           QuantileData.Rows[4].Cells[0].Value = "0.33333333333333333";
 331           QuantileData.Rows[4].Cells[1].Value = dist.quantile(0.33333333333333333);
 332           QuantileData.Rows[4].Cells[2].Value = dist.quantile_c(0.33333333333333333);
 333         }
 334       }
 335       catch (SystemException se)
 336       {
 337         // TODO add some proper handling here!
 338         MessageBox.Show(se.Message, "Calculation Error");
 339       }
 340     }
 341
 342
 343     private void properties_tab_SelectedIndexChanged(object sender, EventArgs e)
 344     {
 345     }
 346
 347     private void tabPage1_Click(object sender, EventArgs e)
 348     {
 349     }
 350
 351     private void CDF_data_CellContentClick(object sender, DataGridViewCellEventArgs e)
 352     {
 353     }
 354
 355     distexAboutBox DistexAboutBox = new distexAboutBox();
 356
 357     private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
 358     {
 359       DistexAboutBox.ShowDialog();
 360     }
 361
 362     private void DistexForm_Activated(object sender, EventArgs e)
 363     {
 364     }
 365
 366     /// get AssemblyDescription
 367     public string AssemblyDescription
 368     {
 369       get
 370       {
 371         // Get all Description attributes on this assembly
 372         object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyDescriptionAttribute), false);
 373         // If there aren't any Description attributes, return an empty string
 374         if (attributes.Length == 0)
 375           return "";
 376         // If there is a Description attribute, return its value
 377         return ((AssemblyDescriptionAttribute)attributes[0]).Description;
 378       }
 379     }
 380
 381     private void saveFileDialog1_FileOk(object sender, CancelEventArgs e)
 382     {
 383       using (StreamWriter sw = new StreamWriter(this.saveFileDialog.FileName))
 384       { // Write distribution info and properties to file.
 385         sw.WriteLine( AssemblyDescription);
 386         sw.WriteLine("Version " + Assembly.GetExecutingAssembly().GetName().Version.ToString());
 387         // Get parameter names (null "" if no parameter).
 388         int i = distribution.SelectedIndex;
 389         distributionValueLabel.Text = boost_math.any_distribution.distribution_name(i).ToString();
 390         sw.WriteLine(distributionValueLabel.Text + " distribution");
 391         parameterLabel1.Text = boost_math.any_distribution.first_param_name(i).ToString();
 392         parameterLabel2.Text = boost_math.any_distribution.second_param_name(i).ToString();
 393         parameterLabel3.Text = boost_math.any_distribution.third_param_name(i).ToString();
 394         string separator = "\t "; // , or tab or space?
 395         // Write parameter name & value.
 396         sw.WriteLine(parameterLabel1.Text + separator + this.parameter1.Text);
 397         if (boost_math.any_distribution.second_param_name(i).Length.CompareTo(0) != 0)
 398         { // Is a 2nd parameter.
 399           sw.WriteLine(parameterLabel2.Text + separator +  this.parameter2.Text);
 400         }
 401         if (boost_math.any_distribution.third_param_name(i).Length.CompareTo(0) != 0)
 402         { // Is a 3rd parameter.
 403           sw.WriteLine(parameterLabel3.Text + separator + this.parameter3.Text);
 404         }
 405         sw.WriteLine();
 406         sw.WriteLine("Properties");
 407         // Show computed properties of distribution.
 408         double x = double.Parse(parameter1.Text);
 409         double y = double.Parse(parameter2.Text);
 410         double z = double.Parse(parameter3.Text);
 411         dist = new boost_math.any_distribution(i, x, y, z);
 412         // Note global dist might not have been calculated yet if no of the tabs clicked.
 413         try
 414         {
 415             mean.Text = dist.mean().ToString();
 416         }
 417         catch
 418         {
 419             mean.Text = "Undefined";
 420         }
 421         sw.WriteLine("Mean" + separator + mean.Text);
 422         try
 423         {
 424             mode.Text = dist.mode().ToString();
 425         }
 426         catch
 427         {
 428             mode.Text = "Undefined";
 429         }
 430         sw.WriteLine("mode" + separator + mode.Text);
 431         try
 432         {
 433             median.Text = dist.median().ToString();
 434         }
 435         catch
 436         {
 437             median.Text = "Undefined";
 438         }
 439         sw.WriteLine("Median" + separator + median.Text);
 440         try
 441         {
 442             variance.Text = dist.variance().ToString();
 443         }
 444         catch
 445         {
 446             variance.Text = "Undefined";
 447         }
 448         sw.WriteLine("Variance" + separator + variance.Text);
 449         try
 450         {
 451             standard_deviation.Text = dist.standard_deviation().ToString();
 452         }
 453         catch
 454         {
 455             standard_deviation.Text = "Undefined";
 456         }
 457         sw.WriteLine("Standard Deviation" + separator + standard_deviation.Text);
 458         try
 459         {
 460             skewness.Text = dist.skewness().ToString();
 461         }
 462         catch
 463         {
 464             skewness.Text = "Undefined";
 465         }
 466         sw.WriteLine("Skewness" + separator + skewness.Text);
 467         try
 468         {
 469             coefficient_of_variation.Text = dist.coefficient_of_variation().ToString();
 470         }
 471         catch
 472         {
 473             coefficient_of_variation.Text = "Undefined";
 474         }
 475         sw.WriteLine("Cofficient of variation" + separator + coefficient_of_variation.Text);
 476         try
 477         {
 478             kurtosis.Text = dist.kurtosis().ToString();
 479         }
 480         catch
 481         {
 482             kurtosis.Text = "Undefined";
 483         }
 484         sw.WriteLine("Kurtosis" + separator + kurtosis.Text);
 485         try
 486         {
 487             kurtosis_excess.Text = dist.kurtosis_excess().ToString();
 488         }
 489         catch
 490         {
 491             kurtosis_excess.Text = "Undefined";
 492         }
 493         sw.WriteLine("Kurtosis excess" + separator + kurtosis_excess.Text);
 494         sw.WriteLine();
 495
 496         sw.WriteLine("Range from" + separator + dist.lowest().ToString() + separator +
 497         "to" + separator + dist.uppermost().ToString());
 498         sw.WriteLine("Support from " + separator + dist.lower().ToString() +separator+
 499         "to " + separator + dist.upper().ToString());
 500         sw.WriteLine();
 501
 502         //
 503         sw.WriteLine("Quantiles");
 504         if (QuantileData.Rows.Count == 1)
 505         { // Add some defaults:
 506           QuantileData.Rows.Add(5); // 5 Risk levels.
 507           QuantileData.Rows[0].Cells[0].Value = "0.001"; // Risk values as text,
 508           QuantileData.Rows[0].Cells[1].Value = dist.quantile(0.001); // & as double.
 509           QuantileData.Rows[0].Cells[2].Value = dist.quantile_c(0.001);
 510           QuantileData.Rows[1].Cells[0].Value = "0.01";
 511           QuantileData.Rows[1].Cells[1].Value = dist.quantile(0.01); // 99% confidence.
 512           QuantileData.Rows[1].Cells[2].Value = dist.quantile_c(0.01);
 513           QuantileData.Rows[2].Cells[0].Value = "0.05";
 514           QuantileData.Rows[2].Cells[1].Value = dist.quantile(0.05);
 515           QuantileData.Rows[2].Cells[2].Value = dist.quantile_c(0.05);
 516           QuantileData.Rows[3].Cells[0].Value = "0.1";
 517           QuantileData.Rows[3].Cells[1].Value = dist.quantile(0.1);
 518           QuantileData.Rows[3].Cells[2].Value = dist.quantile_c(0.1);
 519           QuantileData.Rows[4].Cells[0].Value = "0.33333333333333333";
 520           QuantileData.Rows[4].Cells[1].Value = dist.quantile(0.33333333333333333);
 521           QuantileData.Rows[4].Cells[2].Value = dist.quantile_c(0.33333333333333333);
 522         }
 523         // else have already been calculated by entering the quantile tab.
 524         for (int r = 0; r < QuantileData.Rows.Count-1; r++)
 525         { // Show all the rows of quantiles, including any optional user values.
 526           sw.WriteLine(QuantileData.Rows[r].Cells[0].Value.ToString() + separator +
 527             QuantileData.Rows[r].Cells[1].Value.ToString() + separator +
 528             QuantileData.Rows[r].Cells[2].Value.ToString());
 529         }
 530         sw.WriteLine();
 531         sw.WriteLine("PDF, CDF & complement(s)");
 532         for (int r = 0; r < CDF_data.Rows.Count-1; r++)
 533         { // Show all the rows of pdf, cdf, including any optional user values.
 534           sw.WriteLine(CDF_data.Rows[r].Cells[0].Value.ToString() + separator + // x value.
 535             CDF_data.Rows[r].Cells[1].Value.ToString() + separator + // pdf
 536             CDF_data.Rows[r].Cells[2].Value.ToString() + separator + // cdf
 537             CDF_data.Rows[r].Cells[3].Value.ToString());// cdf complement.
 538         }
 539         sw.WriteLine();
 540     }
 541
 542     } // saveFileDialog1_FileOk
 543
 544     private void saveToolStripMenuItem_Click(object sender, EventArgs e)
 545     {
 546       this.saveFileDialog.ShowDialog();
 547     }
 548
 549     private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
 550     { // Same as Save.
 551       this.saveFileDialog.ShowDialog();
 552     }
 553
 554     private void contentsToolStripMenuItem_Click(object sender, EventArgs e)
 555     { // In lieu of proper help.
 556       string helpText = "\n" + AssemblyDescription +
 557       "\nVersion " + Assembly.GetExecutingAssembly().GetName().Version.ToString() +
 558       "\nA Windows utility to show the properties of distributions " +
 559       "\nand permit calculation of probability density (or mass) function (PDF) " +
 560       "\nand cumulative distribution function (CDF) and complements from values provided." +
 561       "\nQuantiles are also calculated for typical risk (alpha) probabilities" +
 562       "\nand for probabilities provided by the user." +
 563       "\n" +
 564       "\nResults can be saved to text files using Save or SaveAs." +
 565       "\nAll the values on the four tabs are output to the file chosen," +
 566       "\nand are tab separated to assist input to other programs," +
 567       "\nfor example, spreadsheets or text editors." +
 568       "\nNote: when importing to Excel, by default only 10 decimal digits are shown by Excel:" +
 569       "\nit is necessary to format all cells to display the full 15 decimal digits," +
 570       "\nalthough not all computed values will be as accurate as this." +
 571       "\n\nValues shown as NaN cannot be calculated for the value given," +
 572       "\nmost commonly because the value is outside the range for the distribution." +
 573       "\n" +
 574       "\nFor more information, including downloads, see " +
 575       "\nhttp://sourceforge.net/projects/distexplorer/" +
 576       "\n(Note that .NET framework 4.0 and VC Redistribution X86 are requirements for this program.)" +
 577       "\n\nCopyright John Maddock & Paul A. Bristow 2007, 2009, 2010, 2012";
 578
 579       MessageBox.Show("Statistical Distribution Explorer\n" + helpText);
 580     }
 581
 582     private void newToolStripMenuItem_Click(object sender, EventArgs e)
 583     {
 584       MessageBox.Show("New is not yet implemented.");
 585     }
 586
 587     private void openToolStripMenuItem_Click(object sender, EventArgs e)
 588     {
 589       MessageBox.Show("Open is not yet implemented.");
 590     }
 591
 592     private void printToolStripMenuItem_Click(object sender, EventArgs e)
 593     {
 594       MessageBox.Show("Print is not yet implemented." +
 595         "\nSave all values to a text file and print that file.");
 596     }
 597
 598     private void printPreviewToolStripMenuItem_Click(object sender, EventArgs e)
 599     {
 600       MessageBox.Show("Print Preview is not yet implemented." +
 601         "\nSave all values to a text file and print that file.");
 602     }
 603
 604
 605     private void exitToolStripMenuItem_Click(object sender, EventArgs e)
 606     { // exit DistexForm
 607         this.Close();
 608     }
 609   } // class DistexForm
 610 } // namespace distribution_explorer