这是什么 Visual Basic 语法（Begin/End，不是 class）？
What Visual Basic syntax is this (Begin/End, no class)?
最近我的雇主给了我一些旧的源代码，并要求我确定它是否足够可利用以移植到更新的技术，或者我们是否应该从头开始。据我所知，它是用 Visual Studio 编写的 Visual Basic 通用 Windows 项目。我的经验主要是 C#、.Net MVC/Core/Entity Framework，所以我通常可以很好地解读 Visual Basic，但是该项目的大部分内容都包含我似乎无法找到任何信息的语法。
如下图，构成项目大部分的.frm文件包含"Begin VB.Form [FormName]"，其中包含一些属性和组件，被End关闭。之后是一些属性和子程序。 class 中似乎没有任何内容（正如我期望来自 C# 的那样）并且 Visual Studio 到处都在抛出错误（主要是 "Statement cannot appear outside of a method body"）。
我唯一的猜测是 class 在文件顶部的对象中以某种方式被引用，随后的所有内容都扩展了它，但是许多 .frm 文件根本没有对象并且 Visual Studio 两种方式都抱怨。
那么我在这里错过了什么？我只是项目类型错误，导致 Visual Studio 无法正确解释它吗？这是一些我找不到任何信息的旧 Visual Basic 语法吗？它完全是另一种语言吗？或者它可能是超标准的，我只是不知道我在做什么？
感谢您的帮助！
VERSION 5.00
Object = "{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}#2.1#0"; "Mscomctl.ocx"
Begin VB.Form frmEqualizer
BorderStyle = 1 'Fixed Single
Caption = "equalizer settings..."
ClientHeight = 4200
ClientLeft = -15
ClientTop = 375
ClientWidth = 7125
ControlBox = 0 'False
LinkTopic = "Form1"
MaxButton = 0 'False
MinButton = 0 'False
ScaleHeight = 4200
ScaleWidth = 7125
StartUpPosition = 2 'CenterScreen
Begin VB.CommandButton CommandCancel
Cancel = -1 'True
Caption = "Cancel"
Height = 315
Left = 4080
TabIndex = 23
Top = 3600
Width = 1275
End
Begin VB.CommandButton CommandOK
Caption = "OK"
Height = 315
Left = 5640
TabIndex = 22
Top = 3600
Width = 1275
End
Begin VB.ComboBox ComboPresets
Height = 315
Left = 2295
Style = 2 'Dropdown List
TabIndex = 0
Top = 2940
Width = 2535
End
Begin MSComctlLib.Slider Slider80Hz
Height = 1995
Left = 217
TabIndex = 1
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider310Hz
Height = 1995
Left = 1552
TabIndex = 2
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider1000Hz
Height = 1995
Left = 2902
TabIndex = 3
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider3000Hz
Height = 1995
Left = 3562
TabIndex = 4
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider6000Hz
Height = 1995
Left = 4237
TabIndex = 5
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider600Hz
Height = 1995
Left = 2227
TabIndex = 6
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider170Hz
Height = 1995
Left = 892
TabIndex = 7
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider14000Hz
Height = 1995
Left = 5602
TabIndex = 8
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider16000Hz
Height = 1995
Left = 6262
TabIndex = 9
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider12000Hz
Height = 1995
Left = 4927
TabIndex = 10
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin VB.Label Label2
Alignment = 2 'Center
Caption = "80 Hz"
Height = 255
Left = 217
TabIndex = 21
Top = 240
Width = 645
End
Begin VB.Label Label6
Alignment = 2 'Center
Caption = "310 Hz"
Height = 255
Left = 1552
TabIndex = 20
Top = 240
Width = 645
End
Begin VB.Label Label8
Alignment = 2 'Center
Caption = "1 Khz"
Height = 255
Left = 2902
TabIndex = 19
Top = 240
Width = 645
End
Begin VB.Label Label9
Alignment = 2 'Center
Caption = "3 Khz"
Height = 255
Left = 3562
TabIndex = 18
Top = 240
Width = 645
End
Begin VB.Label Label10
Alignment = 2 'Center
Caption = "6 Khz"
Height = 255
Left = 4237
TabIndex = 17
Top = 240
Width = 645
End
Begin VB.Label Label7
Alignment = 2 'Center
Caption = "600 Hz"
Height = 255
Left = 2197
TabIndex = 16
Top = 240
Width = 645
End
Begin VB.Label Label5
Alignment = 2 'Center
Caption = "170 Hz"
Height = 255
Left = 877
TabIndex = 15
Top = 240
Width = 645
End
Begin VB.Label Label11
Alignment = 2 'Center
Caption = "12 Khz"
Height = 255
Left = 4897
TabIndex = 14
Top = 240
Width = 645
End
Begin VB.Label Label13
Alignment = 2 'Center
Caption = "16 Khz"
Height = 255
Left = 6262
TabIndex = 13
Top = 240
Width = 645
End
Begin VB.Label Label14
Alignment = 2 'Center
Caption = "14 Khz"
Height = 255
Left = 5602
TabIndex = 12
Top = 240
Width = 645
End
Begin VB.Label Label12
Caption = "Apply WinAmp (TM) presets"
Height = 255
Left = 2295
TabIndex = 11
Top = 2640
Width = 2415
End
End
Attribute VB_Name = "frmEqualizer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public m_nUserResponse As VbMsgBoxResult
Private Sub ResetEqualizerBands()
Dim nBands As Integer
nBands = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetCount()
For i = 0 To nBands - 1
Dim fFrequency As Single
fFrequency = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetFrequency(i)
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain fFrequency, 0
Next i
Slider80Hz.Value = 0
Slider170Hz.Value = 0
Slider310Hz.Value = 0
Slider600Hz.Value = 0
Slider1000Hz.Value = 0
Slider3000Hz.Value = 0
Slider6000Hz.Value = 0
Slider12000Hz.Value = 0
Slider14000Hz.Value = 0
Slider16000Hz.Value = 0
End Sub
Private Sub UpdateBandsValues()
Dim fBandwidth As Single
Dim fGain As Single
Dim nBands As Integer
nBands = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetCount()
For i = 0 To nBands - 1
' get settings for the specific band, we are interested in knowing the actual "gain"
Dim fFrequency As Single
fFrequency = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetFrequency(i)
frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetParams fFrequency, fBandwidth, fGain
Select Case fFrequency
Case 80
Slider80Hz.Value = -(fGain * 100)
Case 170
Slider170Hz.Value = -(fGain * 100)
Case 310
Slider310Hz.Value = -(fGain * 100)
Case 600
Slider600Hz.Value = -(fGain * 100)
Case 1000
Slider1000Hz.Value = -(fGain * 100)
Case 3000
Slider3000Hz.Value = -(fGain * 100)
Case 6000
Slider6000Hz.Value = -(fGain * 100)
Case 12000
Slider12000Hz.Value = -(fGain * 100)
Case 14000
Slider14000Hz.Value = -(fGain * 100)
Case 16000
' this band is available only for sounds with a sample rate equal or higher to 48000 Hz
Slider16000Hz.Value = -(fGain * 100)
End Select
Next i
End Sub
Private Sub ComboPresets_Change()
If ComboPresets.ListIndex = 0 Then
' reset equalizer values and exit
ResetEqualizerBands
Exit Sub
End If
' load preset keeping in mind that the first element is 'None' so we have to decrease the value
frmStart.ActiveSoundEditor1.Effects.EqualizerLoadPresets ComboPresets.ListIndex - 1
' update the gain for each band
UpdateBandsValues
End Sub
Private Sub ComboPresets_Click()
ComboPresets_Change
End Sub
Private Sub CommandCancel_Click()
m_nUserResponse = vbCancel
Me.Hide
End Sub
Private Sub CommandOK_Click()
m_nUserResponse = vbOK
Me.Hide
End Sub
Private Sub Form_Load()
' fill the combo box with the available presets
ComboPresets.AddItem "None"
ComboPresets.AddItem "Classical"
ComboPresets.AddItem "Club"
ComboPresets.AddItem "Dance"
ComboPresets.AddItem "Full Bass"
ComboPresets.AddItem "Full Bass Treble"
ComboPresets.AddItem "Full Treble"
ComboPresets.AddItem "Laptop Speakers"
ComboPresets.AddItem "Large Hall"
ComboPresets.AddItem "Live"
ComboPresets.AddItem "Party"
ComboPresets.AddItem "Pop"
ComboPresets.AddItem "Reggae"
ComboPresets.AddItem "Rock"
ComboPresets.AddItem "Ska"
ComboPresets.AddItem "Soft"
ComboPresets.AddItem "Soft Rock"
ComboPresets.AddItem "Techno"
ComboPresets.ListIndex = 0
Slider6000Hz.Visible = True
Slider12000Hz.Visible = True
Slider14000Hz.Visible = True
Slider16000Hz.Visible = True
' hide sliders not useful for certain sample rates
Dim nSampleRate As Long
nSampleRate = frmStart.ActiveSoundEditor1.GetFrequency()
If nSampleRate <= 11025 Then
Slider6000Hz.Visible = False
Slider12000Hz.Visible = False
Slider14000Hz.Visible = False
Slider16000Hz.Visible = False
ElseIf nSampleRate <= 22050 Then
Slider12000Hz.Visible = False
Slider14000Hz.Visible = False
Slider16000Hz.Visible = False
ElseIf nSampleRate <= 44100 Then
Slider16000Hz.Visible = False
End If
' check if equalizer bands have already been created
Dim nBands As Integer
nBands = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetCount()
If nBands = 0 Then
' create equalizer bands inside the control
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 80, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 170, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 310, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 600, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 1000, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 3000, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 6000, 12, 0
' these band are available only for sounds with a sample rate starting from 44100 Hz
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 12000, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 14000, 12, 0
' this band is available only for sounds with a sample rate starting from 48000 Hz
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 16000, 12, 0
Else
' update the gain for each band
UpdateBandsValues
End If
End Sub
Private Sub Slider80Hz_Change()
Dim fGain As Single
fGain = -(Slider80Hz.Value / 100)
Slider80Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 80, fGain
End Sub
Private Sub Slider80Hz_Scroll()
Slider80Hz_Change
End Sub
Private Sub Slider170Hz_Change()
Dim fGain As Single
fGain = -(Slider170Hz.Value / 100)
Slider170Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 170, fGain
End Sub
Private Sub Slider170Hz_Scroll()
Slider170Hz_Change
End Sub
Private Sub Slider310Hz_Change()
Dim fGain As Single
fGain = -(Slider310Hz.Value / 100)
Slider310Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 310, fGain
End Sub
Private Sub Slider310Hz_Scroll()
Slider310Hz_Change
End Sub
Private Sub Slider600Hz_Change()
Dim fGain As Single
fGain = -(Slider600Hz.Value / 100)
Slider600Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 600, fGain
End Sub
Private Sub Slider600Hz_Scroll()
Slider600Hz_Change
End Sub
Private Sub Slider1000Hz_Change()
Dim fGain As Single
fGain = -(Slider1000Hz.Value / 100)
Slider1000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 1000, fGain
End Sub
Private Sub Slider1000Hz_Scroll()
Slider1000Hz_Change
End Sub
Private Sub Slider3000Hz_Change()
Dim fGain As Single
fGain = -(Slider3000Hz.Value / 100)
Slider3000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 3000, fGain
End Sub
Private Sub Slider3000Hz_Scroll()
Slider3000Hz_Change
End Sub
Private Sub Slider6000Hz_Change()
Dim fGain As Single
fGain = -(Slider6000Hz.Value / 100)
Slider6000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 6000, fGain
End Sub
Private Sub Slider6000Hz_Scroll()
Slider6000Hz_Change
End Sub
Private Sub Slider12000Hz_Change()
Dim fGain As Single
fGain = -(Slider12000Hz.Value / 100)
Slider12000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 12000, fGain
End Sub
Private Sub Slider12000Hz_Scroll()
Slider12000Hz_Change
End Sub
Private Sub Slider14000Hz_Change()
Dim fGain As Single
fGain = -(Slider14000Hz.Value / 100)
Slider14000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 14000, fGain
End Sub
Private Sub Slider14000Hz_Scroll()
Slider14000Hz_Change
End Sub
Private Sub Slider16000Hz_Change()
Dim fGain As Single
fGain = -(Slider16000Hz.Value / 100)
Slider16000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 16000, fGain
End Sub
Private Sub Slider16000Hz_Scroll()
Slider16000Hz_Change
End Sub
VB6（和 VBA）源代码文件包含的数据比 VBIDE 显示的要多。一方面，属性在 VBE 的代码窗格中是非法的。
如果将该文件导入 VBE，您会看到编辑器模块内容从这里开始（该行可能是 Option Explicit 顺便说一句）：
Public m_nUserResponse As VbMsgBoxResult
上面的所有内容都是设计器元数据。来自 C#，您应该熟悉 WinForms 最初是如何类似的混乱（#region 尽管如此），直到 partial classes 得到支持。
Begin VB.Form块可以被认为是某种frmEqualizer.designer.vb部分class；代码文件 本身 是 一个 class 定义，如以下属性所示：
Attribute VB_Name = "frmEqualizer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
如果您正在翻译此代码或将其迁移到 .NET/WinForms，那么 Begin VB.Form 块就是您的布局元数据，它告诉 VB 在表单的哪个位置加载哪些控件，以及它们的设计器属性是什么：
Begin MSComctlLib.Slider Slider14000Hz
Height = 1995
Left = 5602
TabIndex = 8
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
例如，此块定义了一个名为 Slider14000Hz 的 MSComctlLib.Slider 设计时实例，它从 -1500 滑动到 1500，宽 645 缇，高 1995 缇，位于（顶部：420，left:5602) 在表单坐标中（从左上角算起 twips）。
这一行：
Object = "{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}#2.1#0"; "Mscomctl.ocx"
正在加载使用 CLSID {831FDD16-0C5C-11D2-A9FC-0000F8754DA1} 注册的 COM 对象，版本 2.1，库 "Mscomctl.ocx" - 又名 Microsoft Common Controls，32 位库定义这里使用的Slider控件（如果是VB代码，只能在32位Office主机上运行）
如果表单有二进制元数据（例如嵌入的图标或图像），在与 .frm 相同的文件夹中应该有一个同名的 .frx 文件。
最近我的雇主给了我一些旧的源代码，并要求我确定它是否足够可利用以移植到更新的技术，或者我们是否应该从头开始。据我所知，它是用 Visual Studio 编写的 Visual Basic 通用 Windows 项目。我的经验主要是 C#、.Net MVC/Core/Entity Framework，所以我通常可以很好地解读 Visual Basic，但是该项目的大部分内容都包含我似乎无法找到任何信息的语法。
如下图，构成项目大部分的.frm文件包含"Begin VB.Form [FormName]"，其中包含一些属性和组件，被End关闭。之后是一些属性和子程序。 class 中似乎没有任何内容（正如我期望来自 C# 的那样）并且 Visual Studio 到处都在抛出错误（主要是 "Statement cannot appear outside of a method body"）。
我唯一的猜测是 class 在文件顶部的对象中以某种方式被引用，随后的所有内容都扩展了它，但是许多 .frm 文件根本没有对象并且 Visual Studio 两种方式都抱怨。
那么我在这里错过了什么？我只是项目类型错误，导致 Visual Studio 无法正确解释它吗？这是一些我找不到任何信息的旧 Visual Basic 语法吗？它完全是另一种语言吗？或者它可能是超标准的，我只是不知道我在做什么？
感谢您的帮助！
VERSION 5.00
Object = "{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}#2.1#0"; "Mscomctl.ocx"
Begin VB.Form frmEqualizer
BorderStyle = 1 'Fixed Single
Caption = "equalizer settings..."
ClientHeight = 4200
ClientLeft = -15
ClientTop = 375
ClientWidth = 7125
ControlBox = 0 'False
LinkTopic = "Form1"
MaxButton = 0 'False
MinButton = 0 'False
ScaleHeight = 4200
ScaleWidth = 7125
StartUpPosition = 2 'CenterScreen
Begin VB.CommandButton CommandCancel
Cancel = -1 'True
Caption = "Cancel"
Height = 315
Left = 4080
TabIndex = 23
Top = 3600
Width = 1275
End
Begin VB.CommandButton CommandOK
Caption = "OK"
Height = 315
Left = 5640
TabIndex = 22
Top = 3600
Width = 1275
End
Begin VB.ComboBox ComboPresets
Height = 315
Left = 2295
Style = 2 'Dropdown List
TabIndex = 0
Top = 2940
Width = 2535
End
Begin MSComctlLib.Slider Slider80Hz
Height = 1995
Left = 217
TabIndex = 1
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider310Hz
Height = 1995
Left = 1552
TabIndex = 2
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider1000Hz
Height = 1995
Left = 2902
TabIndex = 3
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider3000Hz
Height = 1995
Left = 3562
TabIndex = 4
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider6000Hz
Height = 1995
Left = 4237
TabIndex = 5
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider600Hz
Height = 1995
Left = 2227
TabIndex = 6
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider170Hz
Height = 1995
Left = 892
TabIndex = 7
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider14000Hz
Height = 1995
Left = 5602
TabIndex = 8
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider16000Hz
Height = 1995
Left = 6262
TabIndex = 9
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin MSComctlLib.Slider Slider12000Hz
Height = 1995
Left = 4927
TabIndex = 10
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
Begin VB.Label Label2
Alignment = 2 'Center
Caption = "80 Hz"
Height = 255
Left = 217
TabIndex = 21
Top = 240
Width = 645
End
Begin VB.Label Label6
Alignment = 2 'Center
Caption = "310 Hz"
Height = 255
Left = 1552
TabIndex = 20
Top = 240
Width = 645
End
Begin VB.Label Label8
Alignment = 2 'Center
Caption = "1 Khz"
Height = 255
Left = 2902
TabIndex = 19
Top = 240
Width = 645
End
Begin VB.Label Label9
Alignment = 2 'Center
Caption = "3 Khz"
Height = 255
Left = 3562
TabIndex = 18
Top = 240
Width = 645
End
Begin VB.Label Label10
Alignment = 2 'Center
Caption = "6 Khz"
Height = 255
Left = 4237
TabIndex = 17
Top = 240
Width = 645
End
Begin VB.Label Label7
Alignment = 2 'Center
Caption = "600 Hz"
Height = 255
Left = 2197
TabIndex = 16
Top = 240
Width = 645
End
Begin VB.Label Label5
Alignment = 2 'Center
Caption = "170 Hz"
Height = 255
Left = 877
TabIndex = 15
Top = 240
Width = 645
End
Begin VB.Label Label11
Alignment = 2 'Center
Caption = "12 Khz"
Height = 255
Left = 4897
TabIndex = 14
Top = 240
Width = 645
End
Begin VB.Label Label13
Alignment = 2 'Center
Caption = "16 Khz"
Height = 255
Left = 6262
TabIndex = 13
Top = 240
Width = 645
End
Begin VB.Label Label14
Alignment = 2 'Center
Caption = "14 Khz"
Height = 255
Left = 5602
TabIndex = 12
Top = 240
Width = 645
End
Begin VB.Label Label12
Caption = "Apply WinAmp (TM) presets"
Height = 255
Left = 2295
TabIndex = 11
Top = 2640
Width = 2415
End
End
Attribute VB_Name = "frmEqualizer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public m_nUserResponse As VbMsgBoxResult
Private Sub ResetEqualizerBands()
Dim nBands As Integer
nBands = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetCount()
For i = 0 To nBands - 1
Dim fFrequency As Single
fFrequency = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetFrequency(i)
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain fFrequency, 0
Next i
Slider80Hz.Value = 0
Slider170Hz.Value = 0
Slider310Hz.Value = 0
Slider600Hz.Value = 0
Slider1000Hz.Value = 0
Slider3000Hz.Value = 0
Slider6000Hz.Value = 0
Slider12000Hz.Value = 0
Slider14000Hz.Value = 0
Slider16000Hz.Value = 0
End Sub
Private Sub UpdateBandsValues()
Dim fBandwidth As Single
Dim fGain As Single
Dim nBands As Integer
nBands = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetCount()
For i = 0 To nBands - 1
' get settings for the specific band, we are interested in knowing the actual "gain"
Dim fFrequency As Single
fFrequency = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetFrequency(i)
frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetParams fFrequency, fBandwidth, fGain
Select Case fFrequency
Case 80
Slider80Hz.Value = -(fGain * 100)
Case 170
Slider170Hz.Value = -(fGain * 100)
Case 310
Slider310Hz.Value = -(fGain * 100)
Case 600
Slider600Hz.Value = -(fGain * 100)
Case 1000
Slider1000Hz.Value = -(fGain * 100)
Case 3000
Slider3000Hz.Value = -(fGain * 100)
Case 6000
Slider6000Hz.Value = -(fGain * 100)
Case 12000
Slider12000Hz.Value = -(fGain * 100)
Case 14000
Slider14000Hz.Value = -(fGain * 100)
Case 16000
' this band is available only for sounds with a sample rate equal or higher to 48000 Hz
Slider16000Hz.Value = -(fGain * 100)
End Select
Next i
End Sub
Private Sub ComboPresets_Change()
If ComboPresets.ListIndex = 0 Then
' reset equalizer values and exit
ResetEqualizerBands
Exit Sub
End If
' load preset keeping in mind that the first element is 'None' so we have to decrease the value
frmStart.ActiveSoundEditor1.Effects.EqualizerLoadPresets ComboPresets.ListIndex - 1
' update the gain for each band
UpdateBandsValues
End Sub
Private Sub ComboPresets_Click()
ComboPresets_Change
End Sub
Private Sub CommandCancel_Click()
m_nUserResponse = vbCancel
Me.Hide
End Sub
Private Sub CommandOK_Click()
m_nUserResponse = vbOK
Me.Hide
End Sub
Private Sub Form_Load()
' fill the combo box with the available presets
ComboPresets.AddItem "None"
ComboPresets.AddItem "Classical"
ComboPresets.AddItem "Club"
ComboPresets.AddItem "Dance"
ComboPresets.AddItem "Full Bass"
ComboPresets.AddItem "Full Bass Treble"
ComboPresets.AddItem "Full Treble"
ComboPresets.AddItem "Laptop Speakers"
ComboPresets.AddItem "Large Hall"
ComboPresets.AddItem "Live"
ComboPresets.AddItem "Party"
ComboPresets.AddItem "Pop"
ComboPresets.AddItem "Reggae"
ComboPresets.AddItem "Rock"
ComboPresets.AddItem "Ska"
ComboPresets.AddItem "Soft"
ComboPresets.AddItem "Soft Rock"
ComboPresets.AddItem "Techno"
ComboPresets.ListIndex = 0
Slider6000Hz.Visible = True
Slider12000Hz.Visible = True
Slider14000Hz.Visible = True
Slider16000Hz.Visible = True
' hide sliders not useful for certain sample rates
Dim nSampleRate As Long
nSampleRate = frmStart.ActiveSoundEditor1.GetFrequency()
If nSampleRate <= 11025 Then
Slider6000Hz.Visible = False
Slider12000Hz.Visible = False
Slider14000Hz.Visible = False
Slider16000Hz.Visible = False
ElseIf nSampleRate <= 22050 Then
Slider12000Hz.Visible = False
Slider14000Hz.Visible = False
Slider16000Hz.Visible = False
ElseIf nSampleRate <= 44100 Then
Slider16000Hz.Visible = False
End If
' check if equalizer bands have already been created
Dim nBands As Integer
nBands = frmStart.ActiveSoundEditor1.Effects.EqualizerBandGetCount()
If nBands = 0 Then
' create equalizer bands inside the control
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 80, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 170, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 310, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 600, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 1000, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 3000, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 6000, 12, 0
' these band are available only for sounds with a sample rate starting from 44100 Hz
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 12000, 12, 0
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 14000, 12, 0
' this band is available only for sounds with a sample rate starting from 48000 Hz
frmStart.ActiveSoundEditor1.Effects.EqualizerBandAdd 16000, 12, 0
Else
' update the gain for each band
UpdateBandsValues
End If
End Sub
Private Sub Slider80Hz_Change()
Dim fGain As Single
fGain = -(Slider80Hz.Value / 100)
Slider80Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 80, fGain
End Sub
Private Sub Slider80Hz_Scroll()
Slider80Hz_Change
End Sub
Private Sub Slider170Hz_Change()
Dim fGain As Single
fGain = -(Slider170Hz.Value / 100)
Slider170Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 170, fGain
End Sub
Private Sub Slider170Hz_Scroll()
Slider170Hz_Change
End Sub
Private Sub Slider310Hz_Change()
Dim fGain As Single
fGain = -(Slider310Hz.Value / 100)
Slider310Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 310, fGain
End Sub
Private Sub Slider310Hz_Scroll()
Slider310Hz_Change
End Sub
Private Sub Slider600Hz_Change()
Dim fGain As Single
fGain = -(Slider600Hz.Value / 100)
Slider600Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 600, fGain
End Sub
Private Sub Slider600Hz_Scroll()
Slider600Hz_Change
End Sub
Private Sub Slider1000Hz_Change()
Dim fGain As Single
fGain = -(Slider1000Hz.Value / 100)
Slider1000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 1000, fGain
End Sub
Private Sub Slider1000Hz_Scroll()
Slider1000Hz_Change
End Sub
Private Sub Slider3000Hz_Change()
Dim fGain As Single
fGain = -(Slider3000Hz.Value / 100)
Slider3000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 3000, fGain
End Sub
Private Sub Slider3000Hz_Scroll()
Slider3000Hz_Change
End Sub
Private Sub Slider6000Hz_Change()
Dim fGain As Single
fGain = -(Slider6000Hz.Value / 100)
Slider6000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 6000, fGain
End Sub
Private Sub Slider6000Hz_Scroll()
Slider6000Hz_Change
End Sub
Private Sub Slider12000Hz_Change()
Dim fGain As Single
fGain = -(Slider12000Hz.Value / 100)
Slider12000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 12000, fGain
End Sub
Private Sub Slider12000Hz_Scroll()
Slider12000Hz_Change
End Sub
Private Sub Slider14000Hz_Change()
Dim fGain As Single
fGain = -(Slider14000Hz.Value / 100)
Slider14000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 14000, fGain
End Sub
Private Sub Slider14000Hz_Scroll()
Slider14000Hz_Change
End Sub
Private Sub Slider16000Hz_Change()
Dim fGain As Single
fGain = -(Slider16000Hz.Value / 100)
Slider16000Hz.Text = fGain
frmStart.ActiveSoundEditor1.Effects.EqualizerBandSetGain 16000, fGain
End Sub
Private Sub Slider16000Hz_Scroll()
Slider16000Hz_Change
End Sub
VB6（和 VBA）源代码文件包含的数据比 VBIDE 显示的要多。一方面，属性在 VBE 的代码窗格中是非法的。
如果将该文件导入 VBE，您会看到编辑器模块内容从这里开始（该行可能是 Option Explicit 顺便说一句）：
Public m_nUserResponse As VbMsgBoxResult
上面的所有内容都是设计器元数据。来自 C#，您应该熟悉 WinForms 最初是如何类似的混乱（#region 尽管如此），直到 partial classes 得到支持。
Begin VB.Form块可以被认为是某种frmEqualizer.designer.vb部分class；代码文件 本身 是 一个 class 定义，如以下属性所示：
Attribute VB_Name = "frmEqualizer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
如果您正在翻译此代码或将其迁移到 .NET/WinForms，那么 Begin VB.Form 块就是您的布局元数据，它告诉 VB 在表单的哪个位置加载哪些控件，以及它们的设计器属性是什么：
Begin MSComctlLib.Slider Slider14000Hz
Height = 1995
Left = 5602
TabIndex = 8
TabStop = 0 'False
Top = 420
Width = 645
_ExtentX = 1138
_ExtentY = 3519
_Version = 393216
Orientation = 1
Min = -1500
Max = 1500
TickStyle = 2
TickFrequency = 150
End
例如，此块定义了一个名为 Slider14000Hz 的 MSComctlLib.Slider 设计时实例，它从 -1500 滑动到 1500，宽 645 缇，高 1995 缇，位于（顶部：420，left:5602) 在表单坐标中（从左上角算起 twips）。
这一行：
Object = "{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}#2.1#0"; "Mscomctl.ocx"
正在加载使用 CLSID {831FDD16-0C5C-11D2-A9FC-0000F8754DA1} 注册的 COM 对象，版本 2.1，库 "Mscomctl.ocx" - 又名 Microsoft Common Controls，32 位库定义这里使用的Slider控件（如果是VB代码，只能在32位Office主机上运行）
如果表单有二进制元数据（例如嵌入的图标或图像），在与 .frm 相同的文件夹中应该有一个同名的 .frx 文件。