Put first paragraph as filename - vba

Question

I am looking for a way to add the first paragraph (user's name) as the Filename.pdf.
I have code to save every new page as a .pdf file.
Now I need every .pdf file to be unique with the user's name written in the first paragraph of the page.
Sub SaveAsSeparatePDFs()
'Updated by Extendoffice 20180906
Dim I As Long
Dim xStr As String
Dim xPathStr As Variant
Dim xDictoryStr As String
Dim xFileDlg As FileDialog
Dim xStartPage, xEndPage As Long
Dim xStartPageStr, xEndPageStr As String
Set xFileDlg = Application.FileDialog(msoFileDialogFolderPicker)
If xFileDlg.Show <> -1 Then
MsgBox "Please chose a valid directory", vbInformation, "Kutools for Word"
Exit Sub
End If
xPathStr = xFileDlg.SelectedItems(1)
xStartPageStr = InputBox("Begin saving PDFs starting with page __? " & vbNewLine & "(ex: 1)", "Kutools for Word")
xEndPageStr = InputBox("Save PDFs until page __?" & vbNewLine & "(ex: 7)", "Kutools for Word")
If Not (IsNumeric(xStartPageStr) And IsNumeric(xEndPageStr)) Then
MsgBox "The enterng start page and end page should be number format", vbInformation, "Kutools for Word"
Exit Sub
End If
xStartPage = CInt(xStartPageStr)
xEndPage = CInt(xEndPageStr)
If xStartPage > xEndPage Then
MsgBox "The start page number can't be larger than end page", vbInformation, "Kutools for Word"
Exit Sub
End If
If xEndPage > ActiveDocument.BuiltInDocumentProperties(wdPropertyPages) Then
xEndPage = ActiveDocument.BuiltInDocumentProperties(wdPropertyPages)
End If
For I = xStartPage To xEndPage
ActiveDocument.ExportAsFixedFormat xPathStr & "\Page_" & Selection.Paragraphs(1).Range.Select & I & ".pdf", _
wdExportFormatPDF, False, wdExportOptimizeForPrint, wdExportFromTo, I, I, wdExportDocumentWithMarkup, _
False, False, wdExportCreateHeadingBookmarks, True, False, False
Next
End Sub
The section of Selection.Paragraphs(1).Range.Select needs to be the first paragraph of every page I am saving to pdf.

Answer 1

If I understood your question correctly you have the username as the first paragraph of each page.
That being the case I would go with something like this:
Dim rg As Range, username As String
For i = xStartPage To xEndPage
Set rg = Activedocument.GoTo(wdGoToPage, wdGoToAbsolute, i)
Set rg = rg.Paragraphs(1).Range
rg.Select #<= select for testing only
username = Replace(rg.Text, vbCr, vbNullString) #<= replacing the paragraph sign at the end with nothing
ActiveDocument.ExportAsFixedFormat xPathStr & "\Page_" & username & i & ".pdf", _
wdExportFormatPDF, False, wdExportOptimizeForPrint, wdExportFromTo, i, i, wdExportDocumentWithMarkup, _
False, False, wdExportCreateHeadingBookmarks, True, False, False
Next

Answer 2

See Split Merged Output to Separate Documents or, better still, Send Mailmerge Output to Individual Files in the Mailmerge Tips and Tricks thread at:
https://www.msofficeforums.com/mail-merge/21803-mailmerge-tips-tricks.html
PS: Although StackOverflow policy is against simply posting links to other sites as answers, I don't propose to re-write code that has been readily available elsewhere for years every time someone tries to reinvent the wheel.