在VBA中合并pdf文件

Question

我有一个子程序，可以将“AnáliseCC” excel工作表打印为pdf文件，该工作表保存在文件夹中，文件名根据我要执行的打印而有所不同。到目前为止，一切都很好。

然后，我正在开发另一个子例程，以将以前的pdf文件与位于同一文件夹中的另一个pdf文件一起编译。我无法使MergePDFs功能正常工作。我究竟做错了什么？下面的代码。谢谢！

Sub ExportAsPDF()
    Dim FolderPath As String     
    FolderPath = "C:\Users\DMM\Certificados"

    'Sheets(Array("Análise CC", "QR Code")).Select
    ActiveSheet.ExportAsFixedFormat Type:=xlTypePDF, Filename:=FolderPath & "\" & Sheets("Análise CC").Range("O4"), _
      openafterpublish:=False, ignoreprintareas:=False

    MsgBox "All PDF's have been successfully exported." 
End Sub


Sub Combine_PDFs()
    Dim strPDFs(0 To 1) As String
    Dim bSuccess As Boolean
    Dim FolderPath As String

    FolderPath = "C:\Users\ITG-0720\OneDrive - INSTITUTO TECNOLOGICO DO GAS\ITG\DMM\Certificados"

    strPDFs(0) = FolderPath & "\" & Sheets("Análise CC").Range("D9")
    strPDFs(1) = FolderPath & "\" & Sheets("Análise CC").Range("O4")

    bSuccess = MergePDFs(strPDFs, "FolderPath & "\" & Sheets("Análise CC").Range("O4")")

    If bSuccess = False Then MsgBox "Failed to combine all PDFs", vbCritical, "Failed to Merge PDFs"
End Sub