这是什么Visual Basic语法（开头/结尾，没有类？）>

问题描述 投票：2回答：1

最近，我从雇主那里得到了一些旧的源代码，并要求我确定它是否可以挽救到足以移植到较新的技术，或者我们是否应该从头开始。据我所知，这是一个用Visual Studio编写的Visual Basic Universal Windows项目。我的经验主要是在C＃、. Net MVC / Core / Entity Framework中进行的，因此我通常可以很好地理解Visual Basic，但是该项目的大部分内容都包含语法，而我似乎找不到任何信息。

如下所示，构成项目大部分内容的.frm文件包含“ Begin VB.Form [FormName]”，其中包含一些属性和组件，并由End关闭。之后，有一些属性和子例程。似乎没有任何东西包装在类中（就像我期望的那样来自C＃），Visual Studio到处都抛出错误（主要是“语句不能出现在方法主体之外”）。

[我唯一的猜测是，该类在文件顶部的对象中以某种方式被引用，并且所有后续内容都对此进行了扩展，但是许多.frm文件根本没有对象，而Visual Studio则抱怨这两种方式。

所以我在这里想念什么？我只是项目类型错误而导致Visual Studio无法正确解释它吗？这是旧的Visual Basic语法，我找不到任何信息吗？完全是另一种语言吗？也许这是超标准的，我不知道自己在做什么？ 😄

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

最近，我从雇主那里得到了一些旧的源代码，并要求我确定它是否可以挽救到足以移植到较新的技术，或者我们是否应该从头开始。据我所知...

syntax identification
1个回答
4
投票

VB6（和VBA）源代码文件包含的数据多于VBIDE可见的数据。在VBE的代码窗格中，属性之一是非法的。

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