Enter Date & Time Stamp In PDF File

Did someone asked you to have a date and time stamp on a PDF file? Here’s a page from Adobe that shows how a stamp can be added into a PDF file. This looked nice and easy to me – I can put the system’s date and time onto the PDF file directly without having any code. The complexity increased when my boss asked me to put the date and time stamp of the email from which the PDF file was downloaded.

I searched the internet, found a piece of code in Adobe Support Community’s Using Excel VBA to add text to a PDF file link and taking a look at the Adobe Acrobat’s JavaScript Scripting Reference and Adobe Acrobat’s API Reference PDF files, I found that I can add a Text(box) field object in the PDF file by executing a JavaScript using VBA.

Please note that the code works in Adobe Acrobat DC Pro (not Adobe Reader DC). You need to test in the previous versions of Adobe Acrobat.

Here is the code that I prepared:

Function InsertDateAndTimeStamp(FilePathAndName As String, DateAndTime As Date)
    '   Function/Procedure Name :   InsertDateAndTimeStamp
    '                               Variable Name(s)    Data Type   Description
    '   Variable(s)             :   FilePathAndName     String      PDF Filename Along With Full Path
    '                               DateAndTime         Date        Date & Time To Be Stamped On The First Page Of PDF File
    '   Return Value            :   None
    '   Description             :   This Function/Procedure puts a date and time stamp on the specified PDF file.
    '                               The code runs a JavaScript that creates a textbox field with a message and
    '                               date and time stamp.
    '   Requirements            :   Requires Adobe Acrobat DC (Not Acrobat Reader DC) Application/Software.
    
    Dim objAdobeAcrobat As Object
    Dim objPDFDocument As Object
    Dim objPDFForm As Object
    Dim objViewPDFDocument As Object
    
    Dim objFileSystem As Object
    
    Dim strOriginalFilename As String
    Dim strSaveAsFilename As String
    Dim strTempFolderPath As String
    Dim strPath As String
    Dim strJavaScript As String
        
    Set objAdobeAcrobat = CreateObject("AcroExch.App")          'Adobe Acrobat Application
    Set objPDFDocument = CreateObject("AcroExch.PDDoc")         'PDF Document
    Set objViewPDFDocument = CreateObject("AcroExch.AVDoc")     'PDF Document (View)
    Set objPDFForm = CreateObject("AFormAut.App")               'From AFormAPI
    
    If objViewPDFDocument.Open(FilePathAndName, "") Then
        Set objPDFDocument = objViewPDFDocument.GetPDDoc
        
        'Write JavaScript Code On A VBA Variable
        strJavaScript = "f = this.addField(" & Chr(34) & "ReceivedByDG" & Chr(34) & ", " & _
            Chr(34) & "text" & Chr(34) & ", 0, [250, 25, 20, 0]);" & _
            "f.readonly = true;" & _
            "f.flatten;" & _
            "f.fillColor = color.transparent;" & _
            "f.textSize = 0; " & _
            "f.textFont = font.CourB;" & _
            "f.textColor = color.red;" & _
            "f.strokeColor = color.red;" & _
            "f.multiline = true;" & _
            "f.value = " & _
            Chr(34) & "Received By Dolphin Godfred\n" & _
            "Date & Time: " & Format(DateAndTime, "d-mmm-yyyy hh:mm:ss AM/PM") & Chr(34) & ";"
        
        'Execute The JavaScript Code
        objPDFForm.Fields.ExecuteThisJavaScript strJavaScript
        
        strOriginalFilename = objPDFDocument.GetFileName
        strSaveAsFilename = "TS_" & strOriginalFilename
        strPath = Environ("Temp") & Application.PathSeparator & _
            strSaveAsFilename
        
        Set objFileSystem = CreateObject("Scripting.FileSystemObject")
        If objFileSystem.FileExists(strPath) Then _
            Call objFileSystem.DeleteFile(strPath, True)
        Call objPDFDocument.Save(1, strPath)
        objPDFDocument.Close
        
        objViewPDFDocument.Close 1
    End If
    
    objAdobeAcrobat.CloseAllDocs
    objAdobeAcrobat.Exit
    
    Call objFileSystem.CopyFile(strPath, FilePathAndName, True)
    
    Set objFileSystem = Nothing
    
    Set objPDFForm = Nothing
    Set objViewPDFDocument = Nothing
    Set objPDFDocument = Nothing
    Set objAdobeAcrobat = Nothing
End Function

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