How to add a string to multiple string for printing external - vb.net

Question

This is going to be a long one, but easy fix.
So i've manage to convert a pdf to string, then able to print an external pdf simply by putting the name of the file in a textbox.
I've also figured how to extract certain text from the pdf string, now the certain text are also files located in an external location (I use c:\temp\ for testing).
Which leaves me with one problem, the text I extract, I use shellexecute to print, works fine if its one string. however, If the file name I extract is more than one it will count it as a single string, thus adding the location and .pdf to that one string. instead of the two or more strings. which will do something like this:
As you can see, it will send that to the printer. I want to send one at a time to the printer. like this:
I've tried using an Arraylist and various methods. but my own lack of knowledge, I cannot figure it out.
I'm thinking a "for loop" will help me out. any ideas?
Below is my code.
Dim pdffilename As String = Nothing
pdffilename = RawTextbox.Text
Dim filepath = "c:\temp\" & RawTextbox.Text & ".pdf"
Dim thetext As String
thetext = GetTextFromPDF(filepath) ' converts pdf to text from a function I didnt show.
Dim re As New Regex("[\t ](?<w>((asm)|(asy)|(717)|(ssm)|(715)|(818))[a-z0-9]*)[\t ]", RegexOptions.ExplicitCapture Or RegexOptions.IgnoreCase Or RegexOptions.Compiled) ' This filters out and extract certain keywords from the PDF
Dim Lines() As String = {thetext}
Dim words As New List(Of String)
For Each s As String In Lines
Dim mc As MatchCollection = re.Matches(s)
For Each m As Match In mc
words.Add(m.Groups("w").Value)
Next
RawRich4.Text = String.Join(Environment.NewLine, words.ToArray)
Next
'This is where I need help with the code. how to have "words" putout "c:\temp\" & RawRich4.Text & ".pdf" with each keyword name
Dim rawtoprint As String = String.Join(Environment.NewLine, words.ToArray)
Dim defname As String = Nothing
defname = RawRich4.Text
rawtoprint = "c:\temp\" & RawRich4.Text & ".pdf"
Dim psi As New System.Diagnostics.ProcessStartInfo()
psi.UseShellExecute = True
psi.Verb = "print"
psi.WindowStyle = ProcessWindowStyle.Hidden
psi.Arguments = PrintDialog1.PrinterSettings.PrinterName.ToString()
psi.FileName = (rawtoprint) ' this is where the error occurs it doesn't send both files separately to the printer, it tries to send it as one name
MessageBox.Show(rawtoprint) ' This is just to test the output, this will be removed.
'Process.Start(psi)
End Sub

Answer 1

Updated.
Imports System.Text.RegularExpressions
Module Program
Sub Main()
Dim pdffilename As String = RawTextbox.Text
Dim filepath = "c:\temp\" & RawTextbox.Text & ".pdf"
Dim thetext As String
thetext = GetTextFromPDF(filepath) ' converts pdf to text from a function I didnt show.
'thetext = "Random text here and everywhere ASM00200207 1 1 same here bah boom 12303 doh hel232 ASM00200208 1 2 "
Dim pattern As String = "(?i)[\t ](?<w>((asm)|(asy)|(717)|(ssm)|(715)|(818))[a-z0-9]*)[\t ]"
For Each m As Match In rgx.Matches(thetext, pattern)
'Console.WriteLine("C:\temp\" & Trim(m.ToString) & ".pdf")
RawPrintFunction("C:\temp\" & Trim(m.ToString) & ".pdf")
Next
End Sub
Function RawPrintFunction(ByVal rawtoprint As String) As Integer
Dim psi As New System.Diagnostics.ProcessStartInfo()
psi.UseShellExecute = True
psi.Verb = "print"
psi.WindowStyle = ProcessWindowStyle.Hidden
psi.Arguments = PrintDialog1.PrinterSettings.PrinterName.ToString()
MessageBox.Show(rawtoprint) This will be removed, this is just for testing to see what files will be printed
'Process.Start(psi) This will be uncomment.
return 0
End Function
End Module

Answer 2

If I don't misunderstand the code -since I can't test and run it here- you can iterate through file names stored in words variable and send it to printer. Following is an example on how to do that :
....
....
Dim Lines() As String = {thetext}
Dim words As New List(Of String)
For Each s As String In Lines
Dim mc As MatchCollection = re.Matches(s)
For Each m As Match In mc
words.Add(m.Groups("w").Value)
Next
RawRich4.Text = String.Join(Environment.NewLine, words.ToArray)
Next
For Each fileName As String In words
Dim rawtoprint As String
rawtoprint = "c:\temp\" & fileName & ".pdf"
Dim psi As New System.Diagnostics.ProcessStartInfo()
psi.UseShellExecute = True
psi.Verb = "print"
psi.WindowStyle = ProcessWindowStyle.Hidden
psi.Arguments = PrintDialog1.PrinterSettings.PrinterName.ToString()
psi.FileName = (rawtoprint) ' this is where the error occurs it doesn't send both files separately to the printer, it tries to send it as one name
MessageBox.Show(rawtoprint) ' This is just to test the output, this will be removed.
'Process.Start(psi)
Next