Sub UpdateDocuments()
Application.ScreenUpdating = False
Dim strFolder As String, strFile As String, strDocNm As String, wdDoc As Document
Dim xlApp As Object, xlWkBk As Object, StrWkBkNm As String, StrWkSht As String
Dim iDataRow As Long, xlFList As String, xlRList As String, i As Long
StrWkBkNm = "C:\Users\" & Environ("Username") & "\Documents\FindReplaceList.xlsx"
StrWkSht = "Sheet1": strDocNm = ActiveDocument.FullName
If Dir(StrWkBkNm) = "" Then
  MsgBox "Cannot find the designated workbook: " & StrWkBkNm, vbExclamation
  Exit Sub
End If
On Error Resume Next
'Start Excel
Set xlApp = CreateObject("Excel.Application")
If xlApp Is Nothing Then
  MsgBox "Can't start Excel.", vbExclamation
  Exit Sub
End If
On Error GoTo 0
With xlApp
  'Hide our Excel session
  .Visible = False
  ' The file is available, so open it.
  Set xlWkBk = .Workbooks.Open(StrWkBkNm, False, True)
  If xlWkBk Is Nothing Then
    MsgBox "Cannot open:" & vbCr & StrWkBkNm, vbExclamation
    .Quit: Set xlApp = Nothing: Exit Sub
  End If
  ' Process the workbook.
  With xlWkBk
    'Ensure the worksheet exists
    If SheetExists(xlWkBk, StrWkSht) = True Then
      With .Worksheets(StrWkSht)
        ' Find the last-used row in column A.
        iDataRow = .Cells(.Rows.Count, 1).End(-4162).Row ' -4162 = xlUp
        ' Capture the F/R data.
        For i = 1 To iDataRow
          ' Skip over empty fields to preserve the underlying cell contents.
          If Trim(.Range("A" & i)) <> vbNullString Then
            xlFList = xlFList & "|" & Trim(.Range("A" & i))
            xlRList = xlRList & "|" & Trim(.Range("B" & i))
          End If
        Next
      End With
    Else
      MsgBox "Cannot find the designated worksheet: " & StrWkSht, vbExclamation
    End If
  .Close False
  End With
  .Quit
End With
' Release Excel object memory
Set xlWkBk = Nothing: Set xlApp = Nothing
'Exit if there are no data
If xlFList = "" Then Exit Sub
'Get the folder to process
strFolder = GetFolder
If strFolder = "" Then Exit Sub
strFile = Dir(strFolder & "\*.doc", vbNormal)
'Process each document in the folder
While strFile <> ""
  If strFolder & "\" & strFile <> strDocNm Then
    Set wdDoc = Documents.Open(FileName:=strFolder & "\" & strFile, AddToRecentFiles:=False, Visible:=False)
    'Process each word from the F/R List
    With wdDoc
      With .Range.Find
        .ClearFormatting
        .Replacement.ClearFormatting
        .MatchWholeWord = True
        .MatchCase = True
        .Wrap = wdFindContinue
        For i = 1 To UBound(Split(xlFList, "|"))
          .Text = Split(xlFList, "|")(i)
          .Replacement.Text = Split(xlRList, "|")(i)
          .Execute Replace:=wdReplaceAll
        Next
      End With
      'Close the document
      .Close SaveChanges:=True
    End With
  End If
  'Get the next document
  strFile = Dir()
Wend
Set wdDoc = Nothing
Application.ScreenUpdating = True
End Sub
 
Function GetFolder() As String
Dim oFolder As Object
GetFolder = ""
Set oFolder = CreateObject("Shell.Application").BrowseForFolder(0, "Choose a folder", 0)
If (Not oFolder Is Nothing) Then GetFolder = oFolder.Items.Item.Path
Set oFolder = Nothing
End Function
 
Function SheetExists(xlWkBk As Object, SheetName As String) As Boolean
Dim i As Long: SheetExists = False
With xlWkBk
  For i = 1 To .Sheets.Count
    If .Sheets(i).Name = SheetName Then
      SheetExists = True:   Exit For
    End If
  Next
End With
End Function