cdplay.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
Imports VB = Microsoft.VisualBasic
Friend Class frmMain
	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
	'Windows 窗体设计器所必需的
	Private components As System.ComponentModel.Container
	Public ToolTip1 As System.Windows.Forms.ToolTip
	Public WithEvents cmdVolume As System.Windows.Forms.Button
	Public WithEvents Timer1 As System.Windows.Forms.Timer
	Public WithEvents cmdNext As System.Windows.Forms.Button
	Public WithEvents cmdPrev As System.Windows.Forms.Button
	Public WithEvents cmdDoorClose As System.Windows.Forms.Button
	Public WithEvents cmdEject As System.Windows.Forms.Button
	Public WithEvents cmdPlay As System.Windows.Forms.Button
	Public WithEvents cmdPause As System.Windows.Forms.Button
	Public WithEvents cmdClose As System.Windows.Forms.Button
	Public WithEvents cmdOpen As System.Windows.Forms.Button
	Public WithEvents cmdReset As System.Windows.Forms.Button
	Public WithEvents txtLength As System.Windows.Forms.TextBox
	Public WithEvents txtCurrent As System.Windows.Forms.TextBox
	Public WithEvents Label1 As System.Windows.Forms.Label
	Public WithEvents Label2 As System.Windows.Forms.Label
	'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()
		Me.ToolTip1 = New System.Windows.Forms.ToolTip(components)
		Me.ToolTip1.Active = True
		Me.cmdVolume = New System.Windows.Forms.Button
		Me.Timer1 = New System.Windows.Forms.Timer(components)
		Me.cmdNext = New System.Windows.Forms.Button
		Me.cmdPrev = New System.Windows.Forms.Button
		Me.cmdDoorClose = New System.Windows.Forms.Button
		Me.cmdEject = New System.Windows.Forms.Button
		Me.cmdPlay = New System.Windows.Forms.Button
		Me.cmdPause = New System.Windows.Forms.Button
		Me.cmdClose = New System.Windows.Forms.Button
		Me.cmdOpen = New System.Windows.Forms.Button
		Me.cmdReset = New System.Windows.Forms.Button
		Me.txtLength = New System.Windows.Forms.TextBox
		Me.txtCurrent = New System.Windows.Forms.TextBox
		Me.Label1 = New System.Windows.Forms.Label
		Me.Label2 = New System.Windows.Forms.Label
		Me.Text = "CD播放程序"
		Me.ClientSize = New System.Drawing.Size(312, 163)
		Me.Location = New System.Drawing.Point(4, 23)
		Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
		Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
		Me.BackColor = System.Drawing.SystemColors.Control
		Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Sizable
		Me.ControlBox = True
		Me.Enabled = True
		Me.KeyPreview = False
		Me.MaximizeBox = True
		Me.MinimizeBox = True
		Me.Cursor = System.Windows.Forms.Cursors.Default
		Me.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.ShowInTaskbar = True
		Me.HelpButton = False
		Me.WindowState = System.Windows.Forms.FormWindowState.Normal
		Me.Name = "frmMain"
		Me.cmdVolume.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdVolume.Text = "音量"
		Me.cmdVolume.Size = New System.Drawing.Size(49, 25)
		Me.cmdVolume.Location = New System.Drawing.Point(240, 112)
		Me.cmdVolume.TabIndex = 13
		Me.cmdVolume.BackColor = System.Drawing.SystemColors.Control
		Me.cmdVolume.CausesValidation = True
		Me.cmdVolume.Enabled = True
		Me.cmdVolume.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdVolume.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdVolume.TabStop = True
		Me.cmdVolume.Name = "cmdVolume"
		Me.Timer1.Interval = 10
		Me.Timer1.Enabled = True
		Me.cmdNext.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdNext.Text = "下一曲"
		Me.cmdNext.Size = New System.Drawing.Size(49, 25)
		Me.cmdNext.Location = New System.Drawing.Point(184, 112)
		Me.cmdNext.TabIndex = 12
		Me.cmdNext.BackColor = System.Drawing.SystemColors.Control
		Me.cmdNext.CausesValidation = True
		Me.cmdNext.Enabled = True
		Me.cmdNext.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdNext.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdNext.TabStop = True
		Me.cmdNext.Name = "cmdNext"
		Me.cmdPrev.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdPrev.Text = "上一曲"
		Me.cmdPrev.Size = New System.Drawing.Size(49, 25)
		Me.cmdPrev.Location = New System.Drawing.Point(128, 112)
		Me.cmdPrev.TabIndex = 11
		Me.cmdPrev.BackColor = System.Drawing.SystemColors.Control
		Me.cmdPrev.CausesValidation = True
		Me.cmdPrev.Enabled = True
		Me.cmdPrev.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdPrev.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdPrev.TabStop = True
		Me.cmdPrev.Name = "cmdPrev"
		Me.cmdDoorClose.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdDoorClose.Text = "关门"
		Me.cmdDoorClose.Size = New System.Drawing.Size(49, 25)
		Me.cmdDoorClose.Location = New System.Drawing.Point(72, 112)
		Me.cmdDoorClose.TabIndex = 10
		Me.cmdDoorClose.BackColor = System.Drawing.SystemColors.Control
		Me.cmdDoorClose.CausesValidation = True
		Me.cmdDoorClose.Enabled = True
		Me.cmdDoorClose.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdDoorClose.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdDoorClose.TabStop = True
		Me.cmdDoorClose.Name = "cmdDoorClose"
		Me.cmdEject.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdEject.Text = "退碟"
		Me.cmdEject.Size = New System.Drawing.Size(49, 25)
		Me.cmdEject.Location = New System.Drawing.Point(16, 112)
		Me.cmdEject.TabIndex = 9
		Me.cmdEject.BackColor = System.Drawing.SystemColors.Control
		Me.cmdEject.CausesValidation = True
		Me.cmdEject.Enabled = True
		Me.cmdEject.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdEject.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdEject.TabStop = True
		Me.cmdEject.Name = "cmdEject"
		Me.cmdPlay.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdPlay.Text = "播放"
		Me.cmdPlay.Size = New System.Drawing.Size(49, 25)
		Me.cmdPlay.Location = New System.Drawing.Point(72, 80)
		Me.cmdPlay.TabIndex = 8
		Me.cmdPlay.BackColor = System.Drawing.SystemColors.Control
		Me.cmdPlay.CausesValidation = True
		Me.cmdPlay.Enabled = True
		Me.cmdPlay.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdPlay.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdPlay.TabStop = True
		Me.cmdPlay.Name = "cmdPlay"
		Me.cmdPause.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdPause.Text = "暂停"
		Me.cmdPause.Size = New System.Drawing.Size(49, 25)
		Me.cmdPause.Location = New System.Drawing.Point(128, 80)
		Me.cmdPause.TabIndex = 7
		Me.cmdPause.BackColor = System.Drawing.SystemColors.Control
		Me.cmdPause.CausesValidation = True
		Me.cmdPause.Enabled = True
		Me.cmdPause.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdPause.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdPause.TabStop = True
		Me.cmdPause.Name = "cmdPause"
		Me.cmdClose.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdClose.Text = "关闭"
		Me.cmdClose.Size = New System.Drawing.Size(49, 25)
		Me.cmdClose.Location = New System.Drawing.Point(240, 80)
		Me.cmdClose.TabIndex = 6
		Me.cmdClose.BackColor = System.Drawing.SystemColors.Control
		Me.cmdClose.CausesValidation = True
		Me.cmdClose.Enabled = True
		Me.cmdClose.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdClose.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdClose.TabStop = True
		Me.cmdClose.Name = "cmdClose"
		Me.cmdOpen.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdOpen.Text = "开启"
		Me.cmdOpen.Size = New System.Drawing.Size(49, 25)
		Me.cmdOpen.Location = New System.Drawing.Point(16, 80)
		Me.cmdOpen.TabIndex = 5
		Me.cmdOpen.BackColor = System.Drawing.SystemColors.Control
		Me.cmdOpen.CausesValidation = True
		Me.cmdOpen.Enabled = True
		Me.cmdOpen.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdOpen.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdOpen.TabStop = True
		Me.cmdOpen.Name = "cmdOpen"
		Me.cmdReset.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdReset.Text = "重置"
		Me.cmdReset.Size = New System.Drawing.Size(49, 25)
		Me.cmdReset.Location = New System.Drawing.Point(184, 80)
		Me.cmdReset.TabIndex = 4
		Me.cmdReset.BackColor = System.Drawing.SystemColors.Control
		Me.cmdReset.CausesValidation = True
		Me.cmdReset.Enabled = True
		Me.cmdReset.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdReset.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdReset.TabStop = True
		Me.cmdReset.Name = "cmdReset"
		Me.txtLength.AutoSize = False
		Me.txtLength.Size = New System.Drawing.Size(209, 18)
		Me.txtLength.Location = New System.Drawing.Point(64, 16)
		Me.txtLength.TabIndex = 1
		Me.txtLength.AcceptsReturn = True