Свой UI на WMPLib.WMPlayer

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;
using WMPLib;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        WindowsMediaPlayer myPlayer = new WindowsMediaPlayer(); //создаётся плеер


        //WMPLib.IWMPPlaylist playlist = WMP.playlistCollection.newPlaylist("CoVKA");
        //WMPLib.IWMPMedia media;
        //for (int i = 1; i < 28; i++)
        //    {
        //        media = player.newMedia(music[i].Url.ToString());
        //        media.setItemInfo("name", String.Format("{0} - {1}", music[i].Artist, music[i].Title)); //E_ACCESSDENIED
        //        playlist.appendItem(media);
        //    }

        double Player_file_position = 0;
        string Player_file_current_file = null;
        Timer myTimer = new Timer();

        bool isFileChanged()
        {
            return this.listBox1.SelectedItem.ToString() != this.Player_file_current_file;
        }

        private void Form1_Load(object sender, EventArgs e)
        {

            FolderBrowserDialog of = new FolderBrowserDialog();
            of.RootFolder = Environment.SpecialFolder.Desktop;
            of.Description = "Choose mp3 file!";
            of.ShowNewFolderButton = false;
            string Path;
            if (of.ShowDialog() == System.Windows.Forms.DialogResult.OK) Path = of.SelectedPath;
            else Path = "C:\\";

            System.IO.DirectoryInfo df = new System.IO.DirectoryInfo(Path);
            System.IO.FileInfo[] fiArr = df.GetFiles("*.mp3");
            foreach (var file in fiArr)
            {
                this.listBox1.Items.Add(Path + "\\" + file);
            }
            //this.button1.Click += new System.EventHandler(this.button1_Click);

            this.myTimer.Interval = 1000;
            this.myTimer.Tick += new EventHandler(tick);

        }
        private void tick(Object sender, EventArgs e)
        {
            if (this.trackBar2.Value == this.trackBar2.Maximum) this.myTimer.Stop();
            else this.trackBar2.Value++;
            this.label2.Text = this.trackBar2.Value.ToString();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (Player_file_current_file == null && this.listBox1.SelectedItem == null)
            {
                this.myPlayer.URL = this.listBox1.Items[0].ToString(); //путь к файлу присваиваем проигрывателю
                this.Player_file_current_file = this.myPlayer.URL;
                this.myPlayer.controls.play(); //воспроизводим
            }
            if (this.listBox1.SelectedItem != null && Player_file_current_file == null)
            {
                this.myPlayer.URL = this.listBox1.SelectedItem.ToString(); //путь к файлу присваиваем проигрывателю
                this.Player_file_current_file = this.myPlayer.URL;
                this.myPlayer.controls.play(); //воспроизводим
            }
            if (myPlayer.playState == WMPLib.WMPPlayState.wmppsPlaying)
            {
                if (isFileChanged())
                {
                    this.myPlayer.URL = this.listBox1.SelectedItem.ToString(); //путь к файлу присваиваем проигрывателю
                    this.Player_file_current_file = this.myPlayer.URL;
                    this.myPlayer.controls.play(); //воспроизводим
                }
            }

            if (myPlayer.playState == WMPLib.WMPPlayState.wmppsPaused)
            {
                this.myPlayer.controls.currentPosition = Player_file_position;
                this.myPlayer.controls.play(); //воспроизводим
            }
            if (myPlayer.playState == WMPLib.WMPPlayState.wmppsStopped)
            {
                this.myPlayer.controls.play(); //воспроизводим
            }
            this.myPlayer.PlayStateChange += new _WMPOCXEvents_PlayStateChangeEventHandler(myPlayer_StateChange);
            this.myPlayer.PositionChange += new _WMPOCXEvents_PositionChangeEventHandler(myPlayer_PositionChange);
            // this.myPlayer.PlayStateChange += new _WMPOCXEvents_PlayStateChangeEventHandler(myPlayer_PlayStateChange);

            this.myTimer.Start();
        }
        private void myPlayer_PlayStateChange(int state)
        {
            label2.Text = state.ToString();
        }
        private void myPlayer_StateChange(int state)
        {            //this.Text += " " + state.ToString();
            switch (state)
            {
                case 0: break;
                case 1: this.label1.Text = "00:00"; break;
                case 2:
                case 3:
                    {
                        this.label1.Text = this.myPlayer.currentMedia.duration.ToString();//currentPlaylist.Item[0].getItemInfoByAtom(1);
                        this.trackBar2.Maximum = (int)this.myPlayer.currentMedia.duration;
                        break;
                    }
                default: break;
            }
        }
        private void myPlayer_PositionChange(double oldPosition, double newPosition)//(object sender, _WMPOCXEvents_PositionChangeEventHandler e)
        {
            this.Text = oldPosition.ToString() + " | " + newPosition.ToString();
            this.label2.Text = newPosition.ToString();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (this.myPlayer.playState == WMPLib.WMPPlayState.wmppsPlaying)
            {
                Player_file_position = myPlayer.controls.currentPosition;
                this.myPlayer.controls.pause();
                this.myTimer.Stop();
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.myPlayer.controls.stop(); //останавливаем воспроизведение
        }

        private void button4_Click(object sender, EventArgs e)
        {
            this.myPlayer.controls.previous();
        }

        private void button4_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                this.myPlayer.controls.fastReverse();
            }
        }

        private void button4_MouseUp(object sender, MouseEventArgs e)
        {

        }

        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            this.myPlayer.settings.volume = this.trackBar1.Value;
            this.Text = (myPlayer.settings.volume.ToString() + " | " + this.trackBar1.Value);
            //this.button1_Click(sender, e);
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (myPlayer.settings.volume < 100)
            {
                myPlayer.settings.volume++;
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (myPlayer.settings.volume > 0)
            {
                myPlayer.settings.volume--;
            }
        }

        private void trackBar2_Scroll(object sender, EventArgs e)
        {
            this.myPlayer.controls.currentPosition = this.trackBar2.Value;
        }

        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            this.axWindowsMediaPlayer1.URL = this.listBox1.SelectedItem.ToString();
            this.axWindowsMediaPlayer1.Ctlcontrols.play();
        }
    }
}