Public Class Form1
    Inherits System.Windows.Forms.Form
    ' Константы
    Public Const SND_SYNC = &H0
    Public Const SND_ASYNC = &H1
    Public Const SND_FILENAME = &H20000
    Public Const SND_RESOURCE = &H40004

    Private Declare Auto Function PlaySound Lib "winmm.dll" ( _
           ByVal name As String, _
           ByVal hmod As Integer, _
           ByVal flags As Integer) As Integer
    Private Declare Function waveOutGetNumDevs Lib "winmm" () As Integer
    Private Declare Function waveInGetNumDevs Lib "winmm.dll" () As Integer

    ' Функция для воспроизведения midi
    Private Declare Function mciSendString Lib "winmm.dll" _
                            Alias "mciSendStringA" _
                            ByVal lpstrCommand As String, _
                            ByVal lpstrReturnString As String, _
                            ByVal uReturnLength As Long, _
                            ByVal hwndCallback As Long) As Long


#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents butPlay As System.Windows.Forms.Button
    Friend WithEvents butSoundCard As System.Windows.Forms.Button
    Friend WithEvents butIn As System.Windows.Forms.Button
    Friend WithEvents lblInfo As System.Windows.Forms.Label
    Friend WithEvents butMidi As System.Windows.Forms.Button
    Friend WithEvents butCloseMidi As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.butPlay = New System.Windows.Forms.Button
        Me.butSoundCard = New System.Windows.Forms.Button
        Me.butIn = New System.Windows.Forms.Button
        Me.lblInfo = New System.Windows.Forms.Label
        Me.butMidi = New System.Windows.Forms.Button
        Me.butCloseMidi = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'butPlay
        '
        Me.butPlay.Location = New System.Drawing.Point(8, 56)
        Me.butPlay.Name = "butPlay"
        Me.butPlay.Size = New System.Drawing.Size(144, 32)
        Me.butPlay.TabIndex = 0
        Me.butPlay.Text = "Воспроизвести звук"
        '
        'butSoundCard
        '
        Me.butSoundCard.Location = New System.Drawing.Point(8, 16)
        Me.butSoundCard.Name = "butSoundCard"
        Me.butSoundCard.Size = New System.Drawing.Size(144, 32)
        Me.butSoundCard.TabIndex = 1
        Me.butSoundCard.Text = "Проверка звуковой карты"
        '
        'butIn
        '
        Me.butIn.Location = New System.Drawing.Point(8, 96)
        Me.butIn.Name = "butIn"
        Me.butIn.Size = New System.Drawing.Size(144, 32)
        Me.butIn.TabIndex = 2
        Me.butIn.Text = "Устройства записи"
        '
        'lblInfo
        '
        Me.lblInfo.Location = New System.Drawing.Point(176, 24)
        Me.lblInfo.Name = "lblInfo"
        Me.lblInfo.Size = New System.Drawing.Size(248, 48)
        Me.lblInfo.TabIndex = 3
        '
        'butMidi
        '
        Me.butMidi.Location = New System.Drawing.Point(440, 24)
        Me.butMidi.Name = "butMidi"
        Me.butMidi.Size = New System.Drawing.Size(144, 24)
        Me.butMidi.TabIndex = 4
        Me.butMidi.Text = "MIDI"
        '
        'butCloseMidi
        '
        Me.butCloseMidi.Location = New System.Drawing.Point(440, 72)
        Me.butCloseMidi.Name = "butCloseMidi"
        Me.butCloseMidi.Size = New System.Drawing.Size(144, 24)
        Me.butCloseMidi.TabIndex = 5
        Me.butCloseMidi.Text = "Закрыть MIDI"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
        Me.ClientSize = New System.Drawing.Size(624, 176)
        Me.Controls.Add(Me.butCloseMidi)
        Me.Controls.Add(Me.butMidi)
        Me.Controls.Add(Me.lblInfo)
        Me.Controls.Add(Me.butIn)
        Me.Controls.Add(Me.butSoundCard)
        Me.Controls.Add(Me.butPlay)
        Me.Name = "Form1"
        Me.Text = "Воспроизведение"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub butPlay_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butPlay.Click
        PlaySound(Application.StartupPath & "/meow.wav", _
                             Nothing, SND_FILENAME Or SND_ASYNC)

    End Sub

    Private Sub butSoundCard_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butSoundCard.Click
        MsgBox(IsSoundCardPresent)
    End Sub
    Function IsSoundCardPresent() As Boolean
        Return waveOutGetNumDevs() >= 1
    End Function

    Private Sub butIn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butIn.Click
        lblInfo.Text = "Доступно " & waveInGetNumDevs() & " устройства записи"
    End Sub

    Public Sub butMidi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butMidi.Click
        Dim lRet As Long

        Dim testmidi As String = "C:\Windows\Media\town.mid"

        ' Открываем устройство для проигрывания файла MIDI
        lRet = mciSendString( _
          "open " & testmidi & " type sequencer alias mplayer", _
           0&, 0, 0)

        ' Начинаем воспроизведение
        lRet = mciSendString("play mplayer", 0&, 0, 0)

    End Sub

    Private Sub butCloseMidi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butCloseMidi.Click
        ' Закрываем файл и устройство
        mciSendString("close mplayer", 0&, 0, 0)
    End Sub
End Class