mciwavplayer.vb

这是一本用Visual Studio.NET进行多媒体编程的读物

Option Strict Off
Option Explicit On
Friend Class Form1
	Inherits System.Windows.Forms.Form
#Region "Windows 窗体设计器生成的代码"
	Public Sub New()
		MyBase.New()
		If m_vb6FormDefInstance Is Nothing Then
			If m_InitializingDefInstance Then
				m_vb6FormDefInstance = Me
			Else
				Try 
					'对于启动窗体，所创建的第一个实例为默认实例。
					If System.Reflection.Assembly.GetExecutingAssembly.EntryPoint.DeclaringType Is Me.GetType Then
						m_vb6FormDefInstance = Me
					End If
				Catch
				End Try
			End If
		End If
		'此调用是 Windows 窗体设计器所必需的。
		InitializeComponent()
	End Sub
	'窗体重写处置，以清理组件列表。
	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
    Private components As System.ComponentModel.IContainer
	'Windows 窗体设计器所必需的
		Public ToolTip1 As System.Windows.Forms.ToolTip
	Public WithEvents STOP_Renamed As System.Windows.Forms.Button
	Public WithEvents Text1 As System.Windows.Forms.TextBox
	Public WithEvents PLAY As System.Windows.Forms.Button
	Public WithEvents OPEN As System.Windows.Forms.Button
	Public WithEvents CMDialog1 As AxMSComDlg.AxCommonDialog
	'注意：以下过程是 Windows 窗体设计器所必需的
	'可以使用 Windows 窗体设计器来修改它。
	'不要使用代码编辑器来修改它。
	<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.OPEN = New System.Windows.Forms.Button()
        Me.ToolTip1 = New System.Windows.Forms.ToolTip(Me.components)
        Me.CMDialog1 = New AxMSComDlg.AxCommonDialog()
        Me.STOP_Renamed = New System.Windows.Forms.Button()
        Me.PLAY = New System.Windows.Forms.Button()
        Me.Text1 = New System.Windows.Forms.TextBox()
        CType(Me.CMDialog1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'OPEN
        '
        Me.OPEN.BackColor = System.Drawing.SystemColors.Control
        Me.OPEN.Cursor = System.Windows.Forms.Cursors.Default
        Me.OPEN.Location = New System.Drawing.Point(20, 37)
        Me.OPEN.Name = "OPEN"
        Me.OPEN.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.OPEN.Size = New System.Drawing.Size(84, 29)
        Me.OPEN.TabIndex = 0
        Me.OPEN.Text = "打开"
        '
        'CMDialog1
        '
        Me.CMDialog1.Enabled = True
        Me.CMDialog1.Location = New System.Drawing.Point(102, 37)
        Me.CMDialog1.Name = "CMDialog1"
        Me.CMDialog1.OcxState = CType(resources.GetObject("CMDialog1.OcxState"), System.Windows.Forms.AxHost.State)
        Me.CMDialog1.Size = New System.Drawing.Size(32, 32)
        Me.CMDialog1.TabIndex = 4
        '
        'STOP_Renamed
        '
        Me.STOP_Renamed.BackColor = System.Drawing.SystemColors.Control
        Me.STOP_Renamed.Cursor = System.Windows.Forms.Cursors.Default
        Me.STOP_Renamed.Location = New System.Drawing.Point(246, 37)
        Me.STOP_Renamed.Name = "STOP_Renamed"
        Me.STOP_Renamed.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.STOP_Renamed.Size = New System.Drawing.Size(83, 29)
        Me.STOP_Renamed.TabIndex = 3
        Me.STOP_Renamed.Text = "停止"
        '
        'PLAY
        '
        Me.PLAY.BackColor = System.Drawing.SystemColors.Control
        Me.PLAY.Cursor = System.Windows.Forms.Cursors.Default
        Me.PLAY.Location = New System.Drawing.Point(133, 37)
        Me.PLAY.Name = "PLAY"
        Me.PLAY.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.PLAY.Size = New System.Drawing.Size(83, 29)
        Me.PLAY.TabIndex = 1
        Me.PLAY.Text = "播放"
        '
        'Text1
        '
        Me.Text1.AcceptsReturn = True
        Me.Text1.AutoSize = False
        Me.Text1.BackColor = System.Drawing.SystemColors.Window
        Me.Text1.Cursor = System.Windows.Forms.Cursors.IBeam
        Me.Text1.ForeColor = System.Drawing.SystemColors.WindowText
        Me.Text1.Location = New System.Drawing.Point(20, 9)
        Me.Text1.MaxLength = 0
        Me.Text1.Name = "Text1"
        Me.Text1.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Text1.Size = New System.Drawing.Size(309, 21)
        Me.Text1.TabIndex = 2
        Me.Text1.Text = "Text1"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(340, 75)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.STOP_Renamed, Me.Text1, Me.PLAY, Me.OPEN, Me.CMDialog1})
        Me.Location = New System.Drawing.Point(4, 29)
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "MciExecuteWavePlayer"
        CType(Me.CMDialog1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub
#End Region 
#Region "升级支持"
	Private Shared m_vb6FormDefInstance As Form1
	Private Shared m_InitializingDefInstance As Boolean
	Public Shared Property DefInstance() As Form1
		Get
			If m_vb6FormDefInstance Is Nothing OrElse m_vb6FormDefInstance.IsDisposed Then
				m_InitializingDefInstance = True
				m_vb6FormDefInstance = New Form1()
				m_InitializingDefInstance = False
			End If
			DefInstance = m_vb6FormDefInstance
		End Get
		Set
			m_vb6FormDefInstance = Value
		End Set
	End Property
#End Region

    Public Declare Function mciExecute Lib "winmm.dll" (ByVal lpstrCommand As String) As Integer

    Public FileName As String
    Dim x As Integer
    Private Sub Form1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load
        'aFlag = 1
    End Sub

    Private Sub OPEN_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles OPEN.Click
        Dim temp As Object
        CMDialog1.FileName = ""
        CMDialog1.Flags = MSComDlg.FileOpenConstants.cdlOFNNoReadOnlyReturn
        CMDialog1.Filter = "(*.wav)|*.wav|(*.mid)|*.mid|(*.dat)|*.dat|(*.avi)|*.avi|所有文件|*.*"
        CMDialog1.FilterIndex = 1 '初始的文件过滤方式为*.avi
        CMDialog1.DialogTitle = "打开媒体文件"
        CMDialog1.Action = 1
        If CMDialog1.FileName = "" Then
            'UPGRADE_WARNING: 未能解析对象 temp 的默认属性。 单击以获得更多信息：ms-help://MS.MSDNVS/vbcon/html/vbup1037.htm
            temp = MsgBox("没有文件被打开", 37, "检查")
            Exit Sub
        Else
            FileName = CMDialog1.FileName
            Text1.Text = FileName
        End If
    End Sub

    Private Sub PLAY_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles PLAY.Click
        x = mciExecute("play " & FileName)
    End Sub

    Private Sub STOP_Renamed_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles STOP_Renamed.Click
        x = mciExecute("stop " & FileName)
        End
    End Sub
End Class