Getting password protected PDF total page numbers into excel - excel

Question

I have a list of PDF files saved in a folder, and I am trying to get the total page number of each PDF file and save it to an excel spreadsheet.
The code works fine with normal PDF files, but the code would not work and return total page number = 0 when the PDFs is password protected, does anyone know how to get around this?
Option Explicit
Public Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function EmptyClipboard Lib "user32" () As Long
Public Declare Function CloseClipboard Lib "user32" () As Long
Public Function ClearClipboard()
OpenClipboard (0&)
EmptyClipboard
CloseClipboard
End Function
Sub CountPages()
Dim MyPath As String, MyFile As String
Dim i As Long
MyPath = Cells(1, 7)
MyFile = Dir(MyPath & Application.PathSeparator & "*.pdf", vbDirectory)
Range("A:B").ClearContents
Range("A1") = "File Name": Range("B1") = "Pages"
Range("A1:B1").Font.Bold = True
i = 1
Do While MyFile <> ""
i = i + 1
Cells(i, 1) = MyFile
Cells(i, 2) = GetPageNum(MyPath & Application.PathSeparator & MyFile)
MyFile = Dir
Loop
Columns("A:B").AutoFit
MsgBox "Total of " & i - 1 & " PDF files have been found" & vbCrLf _
& " File names and corresponding count of pages have been written on " _
& ActiveSheet.Name, vbInformation, "Report..."
End Sub
Function GetPageNum(PDF_File As String)
Dim FileNum As Long
Dim strRetVal As String
Dim RegExp
Set RegExp = CreateObject("VBscript.RegExp")
RegExp.Global = True
RegExp.Pattern = "/Type\s*/Page[^s]"
FileNum = FreeFile
Open PDF_File For Binary As #FileNum
strRetVal = Space(LOF(FileNum))
Get #FileNum, , strRetVal
Close #FileNum
GetPageNum = RegExp.Execute(strRetVal).Count
End Function