Looping Through PDF Files - excel

Question

I have a working VBA script that pulls specific form fields from a specified PDF file into a spreadsheet. However I have several hundred PDFs that I need to do this for, so I'd like to loop through files in a directory and perform the same action.
Conveniently I have an old VBA script that loops through Word files in a directory and imports the content of each just how I'd like.
I hardly know VBA but I've adapted scripts in several language including VBA to meet my needs. I thought this would take 10 minutes but its taken several hours. Can somebody please look at my script below and tell me where I'm going wrong? I assume it has something to do with the Word and Acrobat libraries having different requirements, but even my loop isn't displaying the test message.
PS I have Acrobat Pro installed.
My Script (Non-Working)
Private Sub CommandButton1_Click()
Dim f As String: f = "C:\temp\ocopy"
Dim s As String: s = Dir(f & "*.pdf")
Dim AcroApp As Acrobat.CAcroApp
Dim theForm As Acrobat.CAcroPDDoc
Dim jso As Object
Dim text1, text2 As String
Dim col As Integer: col = 1
Do Until s = ""
Set AcroApp = CreateObject("AcroExch.App")
Set theForm = CreateObject("AcroExch.PDDoc")
theForm.Open (f & s)
Set jso = theForm.GetJSObject
text1 = jso.getField("Name of serviceRow1").Value
text2 = jso.getField("Who are the key contacts?").Value
MsgBox text1
MsgBox "text1"
Sheet1.Cells(col, 1).Value = text1
Sheet1.Cells(col, 2).Value = text2
col = col + 1: s = Dir
theForm.Close
AcroApp.Exit
Set AcroApp = Nothing
Set theForm = Nothing
Loop
End Sub
Word Script - Works at Looping and Importing
Sub fromWordDocsToMultiCols()
Dim f As String: f = "C:\temp\Test\"
Dim s As String: s = Dir(f & "*.docx")
Dim wdApp As New Word.Application, wdDoc As Word.Document
Dim col As Integer: col = 1
On Error GoTo errHandler
Do Until s = ""
Set wdDoc = wdApp.Documents.Open(f & s)
wdDoc.Range.Copy
Sheet1.Cells(1, col).Value = s
Sheet1.Cells(2, col).PasteSpecial xlPasteValues
wdDoc.Close False: col = col + 1: s = Dir
Loop
errHandler:
If Err.Number <> 0 Then MsgBox Err.Description
If Not wdApp Is Nothing Then wdApp.Quit False
End Sub
Acrobat Script - Works as Importing One-by-One
Private Sub CommandButton1_Click()
Dim AcroApp As Acrobat.CAcroApp
Dim theForm As Acrobat.CAcroPDDoc
Dim jso As Object
Dim text1, text2 As String
Set AcroApp = CreateObject("AcroExch.App")
Set theForm = CreateObject("AcroExch.PDDoc")
theForm.Open ("C:\temp\ocopy\Minerals asset management.pdf")
Set jso = theForm.GetJSObject
' get the information from the form fiels Text1 and Text2
text1 = jso.getField("Name of serviceRow1").Value
text2 = jso.getField("Who are the key contacts within the team for this service? Please provide one contact per region").Value
Sheet1.Cells(1, 1).Value = text1
Sheet1.Cells(1, 2).Value = text2
theForm.Close
AcroApp.Exit
Set AcroApp = Nothing
Set theForm = Nothing
End Sub
Many thanks in advance.