Imports System.Runtime.InteropServices
Imports System.Text

Public Class Form1

<DllImport("winmm.dll", CharSet:=CharSet.Ansi, EntryPoint:="mciSendString")>
Shared Function mciSendString(ByVal lpstrCommand As String, ByRef lpstrReturnString As StringBuilder, ByVal uReturnLength As Integer, ByVal hwndCallback As Integer) As Integer
End Function

<DllImport("winmm.dll", CharSet:=CharSet.Ansi, EntryPoint:="mciGetErrorString")>
Shared Function mciGetErrorString(ByVal dwError As Integer, ByRef lpstrBuffer As StringBuilder, ByVal uLength As Integer) As Integer
End Function

Dim ReturnString As New StringBuilder(256)
Dim RetValue As Integer
Dim errorstring As New StringBuilder(1024)

Private Sub Form_Unload(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs)
    mciSendString("close all", ReturnString, 256, 0)
End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
    '成不同的文件名，例如基于当前时间
    Dim fileName As String = "Sound_" & DateTime.Now.ToString("yyyyMMddHHmmss") & ".Wav"
    RetValue = mciSendString("stop sounds1", ReturnString, 256, 0)
    RetValue = mciSendString("save sounds1 " & fileName, ReturnString, 256, 0)
    If RetValue = 0 Then
    Else
        mciGetErrorString(RetValue, errorstring, 1024)
        System.Windows.Forms.MessageBox.Show(errorstring.ToString)
    End If
    RetValue = mciSendString("close sounds1", ReturnString, 256, 0)
    Button2.Enabled = False
End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

    Dim fileName As String = "Sound_" & DateTime.Now.ToString("yyyyMMddHHmmss") & ".Wav"
    If IO.File.Exists(Application.StartupPath & "\" & fileName) Then
        RetValue = mciSendString("open " & fileName & " alias sounds1", ReturnString, 256, 0)
        mciSendString("play sounds1", ReturnString, 256, 0)
    Else
        MessageBox.Show("没有声音文件 " & fileName, "提示", MessageBoxButtons.OK)
    End If
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    RetValue = mciSendString("open new type waveaudio alias sounds1", ReturnString, 256, 0)
    If RetValue = 0 Then
        '开始录音...
        RetValue = mciSendString("record sounds1", ReturnString, 256, 0)
        Button2.Enabled = True
    Else
        mciGetErrorString(RetValue, errorstring, 1024)
        System.Windows.Forms.MessageBox.Show(errorstring.ToString)
    End If
End Sub

End Class