VBA - Generate a PDF file of various Excel

I'm trying to make a code to generate a PDF for every Excel file I have in a folder. First of all my code generates a PDF each excel file and then generates a PDF that would be the cover of all these files.

The problem I am having is that it generates in separate files, does anyone have any idea how I could generate a PDF file only?

Sub BatchOpenMultiplePSTFiles()

    Dim objShell As Object

    Dim objWindowsFolder As Object

    Dim strWindowsFolder As String

    Application.ScreenUpdating = False

    'Desliga Atualização de Tela

    Application.DisplayAlerts = False

    'Desliga Alertas

    'Select the specific Windows folder

    Caminho = ThisWorkbook.Path

    'Caminho do Arquivo

    Set objShell = CreateObject("Shell.Application")

    Set objWindowsFolder = objShell.BrowseForFolder(0, "Selecione a pasta com os arquivos" _

    & "Excel que deseja transformar em PDF:", 0, "")

    If Not objWindowsFolder Is Nothing Then

        'Se não selecionar nada, não faz nada

        strWindowsFolder = objWindowsFolder.self.Path & "\"

        Call ProcessFolders(strWindowsFolder)

        'Chama macro para gerar arquivos PDF

        Sheets("Capa e Índice").Visible = True

        'Aba selecionada para ser gerado pdf

        ActiveWorkbook.SaveAs Filename:=strWindowsFolder & "01-Capa.pdf"

        'Salva como pdf

        Sheets("Capa e Índice").Visible = False

        'Oculta Aba

        ChDir strWindowsFolder

        Shell "Explorer.exe" & " " & strWindowsFolder, vbNormalFocus

        'Abrir pasta selecionada

    End If

    ActiveWorkbook.SaveAs Filename:=Caminho & "\XXX.xlsm",
    FileFormat:=xlOpenXMLWorkbookMacroEnabled

    'Salva documento com nome original

    Application.ScreenUpdating = True

    'Liga Atualização de tela

    Application.DisplayAlerts = True

    'Liga Alertas

    MsgBox "Arquivos criados com sucesso"

End Sub

Sub ProcessFolders(strPath As String)

    Dim objFileSystem As Object

    Dim objFolder As Object

    Dim objFile As Object

    Dim objExcelFile As Object

    Dim objWorkbook As Excel.Workbook

    Dim strWorkbookName As String


    Set objFileSystem = CreateObject("Scripting.FileSystemObject")

    Set objFolder = objFileSystem.GetFolder(strPath)

    'Para cada arquivo xlsx é gerado um arquivo PDF

    For Each objFile In objFolder.Files

        strFileExtension = objFileSystem.GetExtensionName(objFile)

        If LCase(strFileExtension) = "xlsx" Then

            Set objExcelFile = objFile

            Set objWorkbook = Application.Workbooks.Open(objExcelFile.Path)


            strWorkbookName = Left(objWorkbook.Name, (Len(objWorkbook.Name) - Len(strFileExtension)) - 1)

            objWorkbook.ExportAsFixedFormat Type:=xlTypePDF, Filename:=strPath & strWorkbookName & ".pdf"


            objWorkbook.Close False

        End If

    Next


    'Gerar PDF para subpastas

    If objFolder.SubFolders.Count > 0 Then

        For Each objSubFolder In objFolder.SubFolders

            If ((objSubFolder.Attributes And 2) = 0) And ((objSubFolder.Attributes And 4) = 0) Then

                ProcessFolders (objSubFolder.Path)

            End If

        Next

    End If

End Sub