c# eventlog calendar defaultbutton formclose mdicontainer

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Net;

using System.Diagnostics;

using System.Threading;

using System.Runtime.InteropServices;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

            Form2 frm = new Form2();

            frm.MdiParent = this;

            frm.Show();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

           /* string s = "";

            IPAddress[] addresslist = Dns.GetHostEntry(Dns.GetHostName()).AddressList;

            for (int i = 0; i < addresslist.Length; i++)

            {

                s += addresslist[i].ToString() + "\n";

            }

            richTextBox1.Text = s;*/

            /* if (SystemInformation.Network)

            {

                MessageBox.Show("connected");

            }

            else

            {

                MessageBox.Show("disconnected");

            }*/

           /* this.AcceptButton = button1;

            this.CancelButton = button1;*/

        }

        private void button1_Click(object sender, EventArgs e)

        {

          /*  this.eventLog1.Log = "Application"; //System, Security, 

            EventLogEntryCollection collection = eventLog1.Entries;

            int count = collection.Count;

            string info = "#" + count.ToString() + " events";

            foreach (EventLogEntry entry in collection)

            {

                info += "\n type: " + entry.EntryType.ToString();

                info += "\n date: " + entry.TimeGenerated.ToLongDateString();

                info += "\n time: " + entry.TimeGenerated.ToLongTimeString();

                info += "\n source: " + entry.Source;

                info += "\n event: " + entry.InstanceId.ToString();

                info += "\n user: " + entry.UserName;

                info += "\n computer: " + entry.MachineName;

            }

            this.richTextBox1.Text = info;*/

          /* if (!EventLog.SourceExists(textBox1.Text))

            {

                EventLog.CreateEventSource(textBox3.Text, textBox1.Text);

            }

            

            EventLog log = new EventLog();

            log.WriteEntry(textBox2.Text);*/

            myear = monthCalendar1.SelectionRange.Start.Year;

            mmonth = monthCalendar1.SelectionRange.Start.Month;

            mday = monthCalendar1.SelectionRange.Start.Day;           

            SystemTime t = new SystemTime();

            t.wYear = (ushort)myear;

            t.wMonth = (ushort)mmonth;

            textBox1.Text = t.wYear.ToString();

            textBox2.Text = t.wMonth.ToString();

            SetSystemTime(ref t);

          

        }

        private int myear, mday, mmonth;

        [DllImport("Kernel32.dll")]

        public static extern bool SetSystemTime(ref SystemTime sysTime);

        [DllImport("Kernel32.dll")]

        public static extern void GetSystemTime(ref SystemTime sysTime);

        [DllImport("Kernel32.dll")]

        public static extern bool SetLocalTime(ref SystemTime sysTime);

        [DllImport("Kernel32.dll")]

        public static extern void GetLocalTime(ref SystemTime sysTime);

        public struct SystemTime

        {

            public ushort wYear;

            public ushort wMonth;

            public ushort wDayOfWeek;

            public ushort wDay;

            public ushort wHour;

            public ushort wMinute;

            public ushort wSecond;

            public ushort wMiliseconds;

        }  

        private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e)

        {

           /* myear = e.Start.Year;

            mmonth = e.Start.Month;

            mday = e.Start.Day; */

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)

        {

            if (MessageBox.Show("close?", "inquiry", MessageBoxButtons.YesNo) == DialogResult.Yes)

            {

                e.Cancel = false;

            }

            else

            {

                e.Cancel = true;

            }

        }

    }

}