This method prints all of the PDFs in the folder c:acrobatdocstoprint.

This code sample is posted here for the general benefit of the PDF development community. Attribution and usage guidelines are as noted in the code source; please respect the wishes of the author when using this code.

Option Explicit ' Force variable declaration
' Author : Planet PDF
' Date : 08 March 1998
' Description: PrintAllAcrobatDocsInDir
' This vb method uses IAC to print all documents in a
' directory.
' This method / function should be extended to suit the requirements
' of an organisation

Public Const POSTSCRIPT_LEVEL = 2
Public Const PDF_WILDCARD = '*.pdf'
Public Const PDF_DIRECTORY = 'c:acrobatdocstoprint'

Sub PrintAllAcrobatDocsInDir()
    Dim AcroExchAVDoc As Object, AcroExchPDDoc As Object, _
        AcroExchApp As Object
        Dim strFileName As String, strPath As String
    Dim iNumberOfPages As Integer
    Set AcroExchApp = CreateObject('AcroExch.App')
    Set AcroExchAVDoc = CreateObject('AcroExch.AVDoc')
    Set AcroExchPDDoc = CreateObject('AcroExch.PDDoc')

' Show the Acrobat Exchange window
    AcroExchApp.Show

' Set the directory / folder to use
    strPath = PDF_DIRECTORY

' Get the first pdf file in the directory
    strFileName = Dir(strPath + PDF_WILDCARD, vbNormal)   

' Start the loop.
    Do While strFileName <> ''

    ' Open the [strFileName] pdf file
        AcroExchAVDoc.Open strPath + strFileName, ''
    ' Get the PDDoc associated with the open AVDoc

 Set AcroExchPDDoc = AcroExchAVDoc.GetPDDoc

    ' Get the number of pages for this pdf [and subtract one as zero based]
        iNumberOfPages = AcroExchPDDoc.GetNumPages - 1

    ' Print all pages in this document
        AcroExchAVDoc.PrintPages 0, iNumberOfPages, POSTSCRIPT_LEVEL, True, False

    ' Close this file
        AcroExchAVDoc.Close True

    ' Get the name of the next file in the directory
        strFileName = Dir
    Loop
    
' Close Acrobat Exchange
    AcroExchApp.Exit
End Sub