There is no reference to Foxit 'Pro' on the Foxit web site, and no indication that I can find Foxit software is programmable from VBA. If it is provided as a 'printer' driver you should be able to simply print to PDF by changing the active printer (see http://www.gmayor.com/fax_from_word.htm for programming suggestions) and print the document, but you may have to manually add the name.

One application that doesn't cost Acrobat prices and can be programmed from Word VBA is PDF Creator. I personally prefer the older version 1.7.3 which I find easier to work with. The following macro will create a PDF with the parameters declared
Option Explicit

Sub PrintToPDFCreator(sPDFName As String, _
                      sPDFPath As String, _
                      odoc As Document, _
                      Optional sMasterPass As String, _
                      Optional sUserPass As String, _
                      Optional bNoCopy As Boolean, _
                      Optional bNoPrint As Boolean, _
                      Optional bNoEdit As Boolean)
Dim pdfjob As Object
Dim sPrinter As String
Dim iCopy As Integer, iPrint As Integer, iEdit As Integer

    If bNoCopy Then iCopy = 1 Else iCopy = 0
    If bNoPrint Then iPrint = 1 Else iPrint = 0
    If bNoEdit Then iEdit = 1 Else iEdit = 0

    'Change active printer to PDFCreator
    With Dialogs(wdDialogFilePrintSetup)
        sPrinter = .Printer
        .Printer = "PDFCreator"
        .DoNotSetAsSysDefault = True
        .Execute
    End With

    Set pdfjob = CreateObject("PDFCreator.clsPDFCreator")

    With pdfjob
        If .cStart("/NoProcessingAtStartup") = False Then
            GoTo err_Handler
        End If

        .cStart "/NoProcessingAtStartup"
        .cOption("UseAutosave") = 1
        .cOption("UseAutosaveDirectory") = 1
        .cOption("AutosaveDirectory") = sPDFPath
        .cOption("AutosaveFilename") = sPDFName
        .cOption("AutosaveFormat") = 0        ' 0 = PDF

        If Not sMasterPass = vbNullString Then

            'The following are required to set security of any kind
            .cOption("PDFUseSecurity") = 1
            .cOption("PDFOwnerPass") = 1
            .cOption("PDFOwnerPasswordString") = sMasterPass

            'To set individual security options
            .cOption("PDFDisallowCopy") = iCopy
            .cOption("PDFDisallowModifyContents") = iEdit
            .cOption("PDFDisallowPrinting") = iPrint

            'To force a user to enter a password before opening
            .cOption("PDFUserPass") = 1
            .cOption("PDFUserPasswordString") = sUserPass
            'To change to High encryption
            .cOption("PDFHighEncryption") = 1
        End If

        .cClearCache
    End With

    'Print the document to PDF
    odoc.PrintOut

    'Wait until the print job has entered the print queue
    Do Until pdfjob.cCountOfPrintjobs = 1
        DoEvents
    Loop
    pdfjob.cPrinterStop = False

    'Wait until PDF creator is finished then release the objects
    Do Until pdfjob.cCountOfPrintjobs = 0
        DoEvents
    Loop
    pdfjob.cClose
    'Restore the original printer
    With Dialogs(wdDialogFilePrintSetup)
        .Printer = sPrinter
        .Execute
    End With
lbl_Exit:
    Set pdfjob = Nothing
    Exit Sub
err_Handler:
    MsgBox "Unable to initialize PDFCreator." & vbCr & vbCr & _
           "This may be an indication that the PDF application has become corrupted, " & _
           "or its spooler blocked by AV software." & vbCr & vbCr & _
           "Re-installing PDF Creator may restore normal working."
    Resume lbl_Exit
End Sub