如何使用VBA从源代码中不使用元素的标记或ID获取值

Sub GetValueFromSourceCode()
    Dim sourceCode As String
    Dim regEx As Object
    Dim matches As Object
    
    ' 获取源代码
    sourceCode = GetSourceCode()
    
    ' 创建正则表达式对象
    Set regEx = CreateObject("VBScript.RegExp")
    regEx.Pattern = "要匹配的模式"  ' 定义匹配模式
    
    ' 执行匹配
    Set matches = regEx.Execute(sourceCode)
    
    ' 提取值
    If matches.Count > 0 Then
        MsgBox matches.Item(0).Value  ' 第一个匹配项的值
    Else
        MsgBox "未找到匹配的值"
    End If
End Sub

Function GetSourceCode() As String
    ' 返回源代码的字符串
    ' 可以根据实际情况修改为获取源代码的方法
End Function

Sub GetValueFromHTMLSourceCode()
    Dim sourceCode As String
    Dim htmlDoc As Object
    Dim valueElement As Object
    
    ' 获取源代码
    sourceCode = GetHTMLSourceCode()
    
    ' 创建HTMLDocument对象
    Set htmlDoc = CreateObject("htmlfile")
    
    ' 加载源代码
    htmlDoc.write sourceCode
    
    ' 搜索元素并提取值
    Set valueElement = htmlDoc.getElementById("要获取值的元素ID")  ' 使用元素ID获取值
    
    If Not valueElement Is Nothing Then
        MsgBox valueElement.innerText  ' 元素的文本内容
    Else
        MsgBox "未找到元素"
    End If
End Sub

Function GetHTMLSourceCode() As String
    ' 返回HTML源代码的字符串
    ' 可以根据实际情况修改为获取HTML源代码的方法
End Function

Sub GetValueFromString()
    Dim sourceCode As String
    Dim startMarker As String
    Dim endMarker As String
    Dim startIndex As Long
    Dim endIndex As Long
    Dim value As String
    
    ' 获取源代码
    sourceCode = GetSourceCode()
    
    ' 定义起始和结束标记
    startMarker = "起始标记"
    endMarker = "结束标记"
    
    ' 定位起始和结束位置
    startIndex = InStr(sourceCode, startMarker)
    endIndex = InStr(sourceCode, endMarker)
    
    If startIndex > 0 And endIndex > 0 Then
        startIndex = startIndex + Len(startMarker)  ' 起始位置后移
        value = Mid(sourceCode, startIndex, endIndex - startIndex)  ' 提取值
        MsgBox value
    Else
        MsgBox "未找到标记或无效的标记位置"
    End If
End Sub

Function GetSourceCode() As String
    ' 返回源代码的字符串
    ' 可以根据实际情况修改为获取源代码的方法
End Function