Need code to merge PDF files in a folder using adobe acrobat X

[ZVI]

Well, then try this one:

Sub Main()
   
    Const DestFile As String = "MergedFile.pdf" ' <-- change to suit
   
    Dim MyPath As String, MyFiles As String
    Dim a() As String, i As Long, f As String
   
     ' Choose the folder or just replace that part by: MyPath = Range("E3")
    With Application.FileDialog(msoFileDialogFolderPicker)
         '.InitialFileName = "C:\Temp\"
        .AllowMultiSelect = False
        If .Show = False Then Exit Sub
        MyPath = .SelectedItems(1)
        DoEvents
    End With
   
      ' Populate the array a() by PDF file names
    If Right(MyPath, 1) <> "\" Then MyPath = MyPath & "\"
    ReDim a(1 To 2 ^ 14)
    f = Dir(MyPath & "*.pdf")
    While Len(f)
        If StrComp(f, DestFile, vbTextCompare) Then
            i = i + 1
            a(i) = f
        End If
        f = Dir()
    Wend
   
    ' Merge PDFs
    If i Then
        ReDim Preserve a(1 To i)
        MyFiles = Join(a, ",")
        Application.StatusBar = "Merging, please wait ..."
        Call MergePDFs(MyPath, MyFiles, DestFile)
        Application.StatusBar = False
    Else
        MsgBox "No PDF files found in" & vbLf & MyPath, vbExclamation, "Canceled"
    End If
   
End Sub
 
Sub MergePDFs(MyPath As String, MyFiles As String, Optional DestFile As String = "MergedFile.pdf")
' ZVI:2013-08-27 http://www.vbaexpress.com/forum/showthread.php?47310-Need-code-to-merge-PDF-files-in-a-folder-using-adobe-acrobat-X
' Reference required: VBE - Tools - References - Acrobat
 
    Dim a As Variant, i As Long, n As Long, ni As Long, p As String
    Dim AcroApp As New Acrobat.AcroApp, PartDocs() As Acrobat.CAcroPDDoc
 
    If Right(MyPath, 1) = "\" Then p = MyPath Else p = MyPath & "\"
    a = Split(MyFiles, ",")
    ReDim PartDocs(0 To UBound(a))
 
    On Error GoTo exit_
    If Len(Dir(p & DestFile)) Then Kill p & DestFile
    For i = 0 To UBound(a)
        ' Check PDF file presence
        If Dir(p & Trim(a(i))) = "" Then
            MsgBox "File not found" & vbLf & p & a(i), vbExclamation, "Canceled"
            Exit For
        End If
        ' Open PDF document
        Set PartDocs(i) = CreateObject("AcroExch.PDDoc")
        PartDocs(i).Open p & Trim(a(i))
        If i Then
            ' Merge PDF to PartDocs(0) document
            ni = PartDocs(i).GetNumPages()
            If Not PartDocs(0).InsertPages(n - 1, PartDocs(i), 0, ni, True) Then
                MsgBox "Cannot insert pages of" & vbLf & p & a(i), vbExclamation, "Canceled"
            End If
            ' Calc the number of pages in the merged document
            n = n + ni
            ' Release the memory
            PartDocs(i).Close
            Set PartDocs(i) = Nothing
        Else
            ' Calc the number of pages in PartDocs(0) document
            n = PartDocs(0).GetNumPages()
        End If
    Next
 
    If i > UBound(a) Then
        ' Save the merged document to DestFile
        If Not PartDocs(0).Save(PDSaveFull, p & DestFile) Then
            MsgBox "Cannot save the resulting document" & vbLf & p & DestFile, vbExclamation, "Canceled"
        End If
    End If
 
exit_:
 
    ' Inform about error/success
    If Err Then
        MsgBox Err.Description, vbCritical, "Error #" & Err.Number
    ElseIf i > UBound(a) Then
        MsgBox "The resulting file is created:" & vbLf & p & DestFile, vbInformation, "Done"
    End If
 
    ' Release the memory
    If Not PartDocs(0) Is Nothing Then PartDocs(0).Close
    Set PartDocs(0) = Nothing
 
    ' Quit Acrobat application
    AcroApp.Exit
    Set AcroApp = Nothing
 
End Sub