[.NET COMPACT FRAMEWORK] CONNAÎTRE ET MODIFIER LE NIVEAU DE SON

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace NiveauSon
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        private void mnuQuit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void btnSetLevel_Click(object sender, EventArgs e)
        {
            Volumes selectedVolume = Volumes.NORMAL;
            switch (cbxSoundLevels.Text)
            {
                case "OFF": 
                    selectedVolume = Volumes.OFF;
                    break;
                case "LOW": 
                    selectedVolume = Volumes.LOW;
                    break;
                case "NORMAL": 
                    selectedVolume = Volumes.NORMAL;
                    break;
                case "MEDIUM": 
                    selectedVolume = Volumes.MEDIUM;
                    break;
                case "HIGH": 
                    selectedVolume = Volumes.HIGH;
                    break;
                case "VERY_HIGH":
                    selectedVolume = Volumes.VERY_HIGH;
                    break;
            }
            SmartDeviceVolume.Volume = selectedVolume;
        }
        private void mnuGetSoundLevel_Click(object sender, EventArgs e)
        {
            cbxSoundLevels.SelectedItem = SmartDeviceVolume.Volume.ToString();
        }

        private void frmMain_Load(object sender, EventArgs e)
        {
            mnuGetSoundLevel_Click(this, e);
        }
    }
    public enum Volumes : int
    {
        OFF = 0,
        LOW = 858993459,
        NORMAL = 1717986918,
        MEDIUM = -1717986919,
        HIGH = -858993460,
        VERY_HIGH = -1
    }
    public static class SmartDeviceVolume
    {
        [DllImport("coredll.dll", SetLastError = true)]
        internal static extern int waveOutSetVolume(IntPtr device, int volume);
        [DllImport("coredll.dll", SetLastError = true)]
        internal static extern int waveOutGetVolume(IntPtr device, ref int volume);
        public static Volumes Volume
        {
            get
            {
                int volume = 0;
                waveOutGetVolume(IntPtr.Zero, ref volume);
                switch (volume)
                {
                    case (int)Volumes.OFF: return Volumes.OFF;
                    case (int)Volumes.LOW: return Volumes.LOW;
                    case (int)Volumes.NORMAL: return Volumes.NORMAL;
                    case (int)Volumes.MEDIUM: return Volumes.MEDIUM;
                    case (int)Volumes.HIGH: return Volumes.HIGH;
                    case (int)Volumes.VERY_HIGH: return Volumes.VERY_HIGH;
                    default: return Volumes.OFF;
                }
            }
            set 
            { 
                waveOutSetVolume(IntPtr.Zero, (int)value); 
            }
        }
    }
}