adding sound APIs to project

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Hi
i've found a code that records voice from Microphone:
1. Open C#.net web applications. And added the blow namespace. using

Microsoft.VisualBasic.Devices; using Microsoft.VisualBasic; using System.Runtime.InteropServices;

2. Add the below API.

[DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)] private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);

3. Create three Buttons and given the below name and text for the buttons. 1. Record 2. SaveStop 3. Read
1. Under Record Button Click paste the below Code:

// record from microphone

mciSendString("open new Type waveaudio Alias recsound", "", 0, 0); mciSendString("record recsound", "", 0, 0);

2. Under Save / Stop button Click, // stop and save

mciSendString("save recsound c:\record.wav", "", 0, 0); mciSendString("close recsound ", "", 0, 0); Computer c = new Computer(); c.Audio.Stop();

3. Under Read Button Click

Computer computer = new Computer(); computer.Audio.Play("c:\record.wav", AudioPlayMode.Background);

Save and Execute it.

my problem is that i dont know how to add sound card's APIs & usings to my project;when i add lines directly to code , there are some errors; i think i should add them in some where else too i'd be so glad if anyone help me

Posted 9-Aug-10 0:11am

rrsharif

Updated 9-Aug-10 0:19am

E.F. Nijboer

v3

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Richard Hauer (5 Limes) · Answer 1 · 2010-09-10T20:12:00

mciSendString sends commands to a multimedia device. Windows will map those commands to the device's drivers for you, so you needn't really worry about what happens in the middle. There are no "usings" required, only the DLLImport as you have it.

Doco for mciSendString on MSDN is at http://msdn.microsoft.com/en-us/library/dd757161(VS.85).aspx[^]

The first parameter is a command. List of commands and their functionality and parameters is at http://msdn.microsoft.com/en-us/library/dd743572(VS.85).aspx[^].

If you get errors it may help to call mciGetErrorString (which translates the error code to a readable message) or see the list of possible return values at http://msdn.microsoft.com/en-us/library/dd757153(VS.85).aspx[^]