form1.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 Slider1 As AxMSComctlLib.AxSlider
	Public WithEvents cmdExit As System.Windows.Forms.Button
	Public WithEvents cmdNext As System.Windows.Forms.Button
	Public WithEvents StatusBar1 As AxMSComctlLib.AxStatusBar
	Public WithEvents cmdNextFrame As System.Windows.Forms.Button
	Public WithEvents cmdPreFrame As System.Windows.Forms.Button
	Public WithEvents cmdPre As System.Windows.Forms.Button
	Public WithEvents cmdPause As System.Windows.Forms.Button
	Public WithEvents cmdPlay As System.Windows.Forms.Button
	Public WithEvents cmdOpen As System.Windows.Forms.Button
	Public WithEvents CommonDialog1 As AxMSComDlg.AxCommonDialog
	Public WithEvents Label2 As System.Windows.Forms.Label
	Public WithEvents Label3 As System.Windows.Forms.Label
	Public WithEvents Label1 As System.Windows.Forms.Label
	Public WithEvents mnuDisplay0 As System.Windows.Forms.MenuItem
	Public WithEvents mnuDisplay1 As System.Windows.Forms.MenuItem
	Public WithEvents mnuDisplay2 As System.Windows.Forms.MenuItem
	Public WithEvents mnuDisplay As System.Windows.Forms.MenuItem
	Public WithEvents mnuQuality0 As System.Windows.Forms.MenuItem
	Public WithEvents mnuQuality1 As System.Windows.Forms.MenuItem
	Public WithEvents mnuQuality As System.Windows.Forms.MenuItem
	Public WithEvents mnuLoopPlay As System.Windows.Forms.MenuItem
	Public WithEvents mnuZoomIn As System.Windows.Forms.MenuItem
	Public WithEvents mnuZoomOut As System.Windows.Forms.MenuItem
	Public WithEvents mnuPlayControl As System.Windows.Forms.MenuItem
	Public MainMenu1 As System.Windows.Forms.MainMenu
	'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.Slider1 = New AxMSComctlLib.AxSlider()
        Me.mnuDisplay2 = New System.Windows.Forms.MenuItem()
        Me.cmdPlay = New System.Windows.Forms.Button()
        Me.mnuDisplay1 = New System.Windows.Forms.MenuItem()
        Me.ToolTip1 = New System.Windows.Forms.ToolTip(Me.components)
        Me.mnuZoomIn = New System.Windows.Forms.MenuItem()
        Me.cmdPreFrame = New System.Windows.Forms.Button()
        Me.mnuQuality0 = New System.Windows.Forms.MenuItem()
        Me.mnuZoomOut = New System.Windows.Forms.MenuItem()
        Me.cmdPre = New System.Windows.Forms.Button()
        Me.mnuPlayControl = New System.Windows.Forms.MenuItem()
        Me.mnuLoopPlay = New System.Windows.Forms.MenuItem()
        Me.MainMenu1 = New System.Windows.Forms.MainMenu()
        Me.mnuDisplay = New System.Windows.Forms.MenuItem()
        Me.mnuDisplay0 = New System.Windows.Forms.MenuItem()
        Me.mnuQuality = New System.Windows.Forms.MenuItem()
        Me.mnuQuality1 = New System.Windows.Forms.MenuItem()
        Me.cmdOpen = New System.Windows.Forms.Button()
        Me.cmdNextFrame = New System.Windows.Forms.Button()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.Label3 = New System.Windows.Forms.Label()
        Me.cmdPause = New System.Windows.Forms.Button()
        Me.cmdNext = New System.Windows.Forms.Button()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.cmdExit = New System.Windows.Forms.Button()
        Me.CommonDialog1 = New AxMSComDlg.AxCommonDialog()
        Me.StatusBar1 = New AxMSComctlLib.AxStatusBar()
        CType(Me.Slider1, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.CommonDialog1, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.StatusBar1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'Slider1
        '
        Me.Slider1.Location = New System.Drawing.Point(31, 37)
        Me.Slider1.Name = "Slider1"
        Me.Slider1.OcxState = CType(resources.GetObject("Slider1.OcxState"), System.Windows.Forms.AxHost.State)
        Me.Slider1.Size = New System.Drawing.Size(646, 56)
        Me.Slider1.TabIndex = 0
        '
        'mnuDisplay2
        '
        Me.mnuDisplay2.Index = 2
        Me.mnuDisplay2.Text = "缩放至窗口大小"
        '
        'cmdPlay
        '
        Me.cmdPlay.BackColor = System.Drawing.SystemColors.Control
        Me.cmdPlay.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdPlay.Location = New System.Drawing.Point(102, 148)
        Me.cmdPlay.Name = "cmdPlay"
        Me.cmdPlay.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdPlay.Size = New System.Drawing.Size(86, 46)
        Me.cmdPlay.TabIndex = 2
        Me.cmdPlay.Text = "播放"
        '
        'mnuDisplay1
        '
        Me.mnuDisplay1.Index = 1
        Me.mnuDisplay1.Text = "随窗口大小变化"
        '
        'mnuZoomIn
        '
        Me.mnuZoomIn.Index = 1
        Me.mnuZoomIn.Text = "放大画面"
        '
        'cmdPreFrame
        '
        Me.cmdPreFrame.BackColor = System.Drawing.SystemColors.Control
        Me.cmdPreFrame.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdPreFrame.Location = New System.Drawing.Point(471, 148)
        Me.cmdPreFrame.Name = "cmdPreFrame"
        Me.cmdPreFrame.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdPreFrame.Size = New System.Drawing.Size(86, 46)
        Me.cmdPreFrame.TabIndex = 5
        Me.cmdPreFrame.Text = "上一帧"
        '
        'mnuQuality0
        '
        Me.mnuQuality0.Index = 0
        Me.mnuQuality0.Text = "低分辨率"
        '
        'mnuZoomOut
        '
        Me.mnuZoomOut.Index = 2
        Me.mnuZoomOut.Text = "缩小画面"
        '
        'cmdPre
        '
        Me.cmdPre.BackColor = System.Drawing.SystemColors.Control
        Me.cmdPre.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdPre.Location = New System.Drawing.Point(287, 148)
        Me.cmdPre.Name = "cmdPre"
        Me.cmdPre.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdPre.Size = New System.Drawing.Size(85, 46)
        Me.cmdPre.TabIndex = 4
        Me.cmdPre.Text = "上一个"
        '
        'mnuPlayControl
        '
        Me.mnuPlayControl.Index = 2
        Me.mnuPlayControl.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuLoopPlay, Me.mnuZoomIn, Me.mnuZoomOut})
        Me.mnuPlayControl.Text = "播放控制"
        '
        'mnuLoopPlay
        '
        Me.mnuLoopPlay.Index = 0
        Me.mnuLoopPlay.Text = "循环播放"
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuDisplay, Me.mnuQuality, Me.mnuPlayControl})
        '
        'mnuDisplay
        '
        Me.mnuDisplay.Index = 0
        Me.mnuDisplay.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuDisplay0, Me.mnuDisplay1, Me.mnuDisplay2})
        Me.mnuDisplay.Text = "显示控制"
        '
        'mnuDisplay0
        '
        Me.mnuDisplay0.Index = 0
        Me.mnuDisplay0.Text = "全部显示"
        '
        'mnuQuality
        '
        Me.mnuQuality.Index = 1
        Me.mnuQuality.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuQuality0, Me.mnuQuality1})
        Me.mnuQuality.Text = "质量控制"
        '
        'mnuQuality1
        '
        Me.mnuQuality1.Index = 1
        Me.mnuQuality1.Text = "高分辨率"
        '
        'cmdOpen
        '
        Me.cmdOpen.BackColor = System.Drawing.SystemColors.Control
        Me.cmdOpen.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdOpen.Location = New System.Drawing.Point(10, 148)
        Me.cmdOpen.Name = "cmdOpen"
        Me.cmdOpen.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdOpen.Size = New System.Drawing.Size(86, 46)
        Me.cmdOpen.TabIndex = 1
        Me.cmdOpen.Text = "打开"
        '
        'cmdNextFrame
        '
        Me.cmdNextFrame.BackColor = System.Drawing.SystemColors.Control
        Me.cmdNextFrame.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdNextFrame.Location = New System.Drawing.Point(563, 148)
        Me.cmdNextFrame.Name = "cmdNextFrame"
        Me.cmdNextFrame.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdNextFrame.Size = New System.Drawing.Size(86, 46)
        Me.cmdNextFrame.TabIndex = 6
        Me.cmdNextFrame.Text = "下一帧"
        '
        'Label2
        '
        Me.Label2.BackColor = System.Drawing.SystemColors.Control
        Me.Label2.Cursor = System.Windows.Forms.Cursors.Default
        Me.Label2.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label2.Location = New System.Drawing.Point(287, 102)
        Me.Label2.Name = "Label2"
        Me.Label2.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Label2.Size = New System.Drawing.Size(93, 38)
        Me.Label2.TabIndex = 11
        Me.Label2.Text = "0"
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.TopCenter
        '
        'Label3
        '
        Me.Label3.BackColor = System.Drawing.SystemColors.Control
        Me.Label3.Cursor = System.Windows.Forms.Cursors.Default
        Me.Label3.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label3.Location = New System.Drawing.Point(604, 102)
        Me.Label3.Name = "Label3"
        Me.Label3.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Label3.Size = New System.Drawing.Size(104, 29)
        Me.Label3.TabIndex = 12
        Me.Label3.Text = "0"
        Me.Label3.TextAlign = System.Drawing.ContentAlignment.TopCenter
        '
        'cmdPause
        '
        Me.cmdPause.BackColor = System.Drawing.SystemColors.Control
        Me.cmdPause.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdPause.Location = New System.Drawing.Point(195, 148)
        Me.cmdPause.Name = "cmdPause"
        Me.cmdPause.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdPause.Size = New System.Drawing.Size(85, 46)
        Me.cmdPause.TabIndex = 3
        Me.cmdPause.Text = "暂停"
        '
        'cmdNext
        '
        Me.cmdNext.BackColor = System.Drawing.SystemColors.Control
        Me.cmdNext.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdNext.Location = New System.Drawing.Point(379, 148)
        Me.cmdNext.Name = "cmdNext"
        Me.cmdNext.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdNext.Size = New System.Drawing.Size(86, 46)
        Me.cmdNext.TabIndex = 8
        Me.cmdNext.Text = "下一个"
        '
        'Label1
        '
        Me.Label1.BackColor = System.Drawing.SystemColors.Control
        Me.Label1.Cursor = System.Windows.Forms.Cursors.Default
        Me.Label1.ForeColor = System.Drawing.SystemColors.ControlText