C#

using Microsoft.VisualBasic.Devices;<br />
using Microsoft.VisualBasic;<br />
using System.Runtime.InteropServices;<br />
using System.Windows.Forms;<br />
<br />
namespace Recorder<br />
{<br />
    public partial class Form1 : Form<br />
    {<br />
        [DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]<br />
        private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);<br />
        <br />
        public Form1()<br />
        {<br />
            InitializeComponent();<br />
        }<br />
<br />
        private void buttRecord_Click(object sender, System.EventArgs e)<br />
        {<br />
            // record from microphone<br />
            mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);<br />
<br />
            mciSendString("format tag pcm", "", 0, 0);<br />
            //mciSendString("set recsound bitspersample 8", "", 0, 0);<br />
            //mciSendString("set recsound samplespersec 32000", "", 0, 0);<br />
            mciSendString("set recsound channels 2", "", 0, 0);<br />
<br />
            mciSendString("record recsound", "", 0, 0);<br />
        }<br />
<br />
        private void buttSaveStop_Click(object sender, System.EventArgs e)<br />
        {<br />
            // stop and save<br />
            mciSendString("save recsound c:\\record.wav", "", 0, 0);<br />
            mciSendString("close recsound ", "", 0, 0);<br />
            Computer c = new Computer();<br />
            c.Audio.Stop();<br />
        }<br />
<br />
        private void buttPlay_Click(object sender, System.EventArgs e)<br />
        {<br />
            Computer computer = new Computer();<br />
            computer.Audio.Play("c:\\record.wav", AudioPlayMode.Background);<br />
        }<br />
    }<br />
}

<br />
using System;<br />
using System.Runtime.InteropServices;<br />
<br />
namespace System<br />
{<br />
	public class WorkingArea<br />
	{<br />
		[DllImport("user32.dll", CharSet=CharSet.Auto, SetLastError=true)]<br />
        [return:MarshalAs(UnmanagedType.Bool)]<br />
        public static extern bool SendMessageTimeout(IntPtr hWnd,int Msg,string lParam,int uTimeout,int lpdwResult);<br />
<br />
		public struct RECT<br />
		{<br />
			public int Left;<br />
			public int Top;<br />
			public int Right;<br />
			public int Bottom;<br />
		}<br />
		[DllImport("User32.dll", EntryPoint = "SystemParametersInfoA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]<br />
		private static extern short SystemParametersInfo(short uAction, short uparam, ref RECT lpvParam, short fuWinIni);<br />
		[DllImport("user32", EntryPoint = "PostMessageA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]<br />
		private static extern int PostMessage(int hwnd, int wMsg, int wParam, ref int lParam);<br />
<br />
	<br />
        public const int HWND_BROADCAST = 0xffff;<br />
        public const int WM_SETTINGCHANGE = 0x001A;<br />
        public const int SMTO_NORMAL = 0x0000;<br />
        public const int SMTO_BLOCK = 0x0001;<br />
        public const int SMTO_ABORTIFHUNG = 0x0002;<br />
        public const int SMTO_NOTIMEOUTIFNOTHUNG = 0x0008;<br />
	public const int SPIF_SENDCHANGE = 0x02;<br />
	public const short SPI_SETWORKAREA = 47;<br />
	<br />
		public void SetWorkArea(RECT rect)<br />
		{<br />
			SystemParametersInfo(SPI_SETWORKAREA, 0,ref rect, SPIF_SENDCHANGE);<br />
			//SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETWORKAREA, "", SMTO_ABORTIFHUNG, 100000, null);<br />
		}<br />
	}<br />
}

WorkingArea WorkSpace = new WorkingArea();<br />
RECT Area = new WorkingArea.RECT();<br />
Area.Left=25;<br />
Area.Top=25;<br />
Area.Bottom=25;<br />
Area.Right=25;<br />
WorkSpace.SetWorkArea(Area);