option explicit

Const vbext_ct_ClassModule = 2
Const vbext_ct_Document = 100
Const vbext_ct_MSForm = 3
Const vbext_ct_StdModule = 1

Sub Main
    Dim xl
    Dim fs
    Dim WBook
    Dim VBComp
    Dim Sfx
    Dim ExportFolder

    If Wscript.Arguments.Count <> 1 Then
        MsgBox "As the only argument, give the FULL path to an XLS file to extract all the VBA from it."
    Else

        Set xl = CreateObject("Excel.Application")
        Set fs = CreateObject("Scripting.FileSystemObject")

        xl.Visible = true
        Set WBook = xl.Workbooks.Open(Trim(wScript.Arguments(0)))
        ExportFolder = WBook.Path & "\" & fs.GetBaseName(WBook.Name)
        fs.CreateFolder(ExportFolder)
        For Each VBComp In WBook.VBProject.VBComponents
            Select Case VBComp.Type
                Case vbext_ct_ClassModule, vbext_ct_Document
                    Sfx = ".cls"
                Case vbext_ct_MSForm
                    Sfx = ".frm"
                Case vbext_ct_StdModule
                    Sfx = ".bas"
                Case Else
                    Sfx = ""
            End Select
            If Sfx <> "" Then
                On Error Resume Next
                Err.Clear
                VBComp.Export ExportFolder & "\" & VBComp.Name & Sfx
                If Err.Number <> 0 Then
                    MsgBox "Failed to export " & ExportFolder & "\" & VBComp.Name & Sfx
                End If
                On Error Goto 0
            End If
        Next
        xl.Quit
    End If
End Sub