title: How to exit a process by catching a mouse click?
body: <p>I'm new to C#, just beginning to write some codes.
  I have something in mind but before proceeding to it, need some help on this matter.
  How to exit a running process by detecting a mouse click?
  I wrote some lines but when compiled and running, the mouse click has no effect at all.
  Can someone please take a look and help me?
  Here's my lines...</p>
  
  <pre><code>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;
  
  namespace Graphic_test_1
  {
      public partial class Form1 : Form
      {
              public static Single lim_x, lim_y; // limits in X &amp; Y
              public static int dly = 45;
              System.Drawing.Pen myPen = new System.Drawing.Pen(System.Drawing.Color.Blue); // color of the pen
              System.Drawing.Graphics Canvas;
              public Boolean clik = false; // initialize
              public string mystring;
              public Form1()
              {
                      InitializeComponent();
              }
  
              protected override void OnMouseClick(MouseEventArgs e)
              {
                      base.OnMouseClick(e);
                      clik = true;
                      lim_x = e.X;
                      lim_y = e.Y;
              }
  
              private void btgo_Click(object sender, EventArgs e) // Start drawing  [GO]
              {
                      Canvas = this.CreateGraphics();
                      btgo.Enabled = false;
                      MessageBox.Show("Checking the limits of the canvas.\r\n" +
                              "Click anywhere to stop and find out X position",
                              "Watching Coordinates",
                              MessageBoxButtons.OK, MessageBoxIcon.Information);
                      btgo.Visible = false;
                      btend.Enabled = false;
  
                      myPen.Color=System.Drawing.Color.Red; // color of the pen
                      myPen.Width = 2; // pen width
                      System.Drawing.Font drawfont = new System.Drawing.Font("Arial", 10); // Graphics font
                      System.Drawing.SolidBrush mybrush = new System.Drawing.SolidBrush(System.Drawing.Color.Black); // color for the font
                      System.Drawing.Color background;
                      background = this.BackColor;
  
                      lim_x = 0; // initialize
                      do
                      {
                              Canvas.DrawLine(myPen, 0, 200, lim_x, 200);
                              mystring = "Current X = " + lim_x.ToString();
                              mybrush.Color = System.Drawing.Color.Black;
                              Canvas.DrawString(mystring, drawfont, mybrush, 351, 334);
                              System.Threading.Thread.Sleep(dly);
                              mybrush.Color = background; // use the background color
                              Canvas.FillRectangle(mybrush, new Rectangle(350, 333, 500, 353));
                              if (clik)
                              {
                                      mybrush.Color = background; // use the background color
                                      Canvas.FillRectangle(mybrush, new Rectangle(350, 333, 500, 353));
                                      mystring = "Current X = " + lim_x.ToString();
                                      mybrush.Color = System.Drawing.Color.Black;
                                      Canvas.DrawString(mystring, drawfont, mybrush, 351, 334);
                                      MessageBox.Show("Final position in X = " + lim_x.ToString(),
                                              "Mouse click detected",
                                              MessageBoxButtons.OK, MessageBoxIcon.Stop);
                                      break;
                              }
                              else
                                      lim_x++;
                      } while (lim_x &lt; 611);
  
                      myPen.Dispose(); // release the pen
                      mybrush.Dispose(); // release the brush
                      Canvas.Dispose(); // release the canvas
                      btend.Enabled = true;
                      btend.Focus();
              }
  
              private void btend_Click(object sender, EventArgs e) // quit program  [END]
              {
                      Dispose(); // program ends.
              }
  
      }
  </code></pre>
  
  <p>}</p>