function ConvertWordTo-PDF {

<# 
 
.SYNOPSIS 

ConvertTo-PDF converts Microsoft Word documents to PDF files. 
 
.DESCRIPTION 

The cmdlet queries the given source folder including sub-folders to find *.docx and *.doc files, 
converts all found files and saves them as pdf in the Destination folder. After completition, the Destination
folder with the newly created PDF files will be opened with Windows Explorer.
 
.PARAMETER SourceFolder
 
Mandatory. Enter the source folder of your Microsoft Word documents.
 
.PARAMETER DestinationFolder

Optional. Enter the Destination folder to save the created PDF documents. If you omit this parameter, pdf files will
be saved in the Source Folder.

.EXAMPLE 

ConvertWordTo-PDF -SourceFolder C:\Temp -DestinationFolder C:\Temp1
ConvertWordTo-PDF -SourceFolder C:\temp
 
.NOTES 
Author: Patrick Gruenauer | Microsoft PowerShell MVP [2018-2021] 
Web: https://sid-500.com 
 
#>

[CmdletBinding()]

param
(
 
[Parameter (Mandatory=$true,Position=0)]
[String]
$SourceFolder,
 
[Parameter (Position=1)]
[String]
$DestinationFolder = $SourceFolder

)

    $i = 0

    $word = New-Object -ComObject word.application 
    $FormatPDF = 17
    $word.visible = $false 
    $types = '*.docx','*.doc'

    If ((Test-Path $SourceFolder) -eq $false) {
    
    throw "Error. Source Folder $SourceFolder not found." } 

    If ((Test-Path $DestinationFolder) -eq $false) {
    
    throw "Error. Destination Folder $DestinationFolder not found." } 
    
    $files = Get-ChildItem -Path $SourceFolder -Include $Types -Recurse -ErrorAction Stop
    ''
    Write-Warning "Converting Files to PDF ..."
    ''
    
    foreach ($f in $files) {

        $path = $DestinationFolder + '\' + $f.Name.Substring(0,($f.Name.LastIndexOf('.')))
        $doc = $word.documents.open($f.FullName) 
        $doc.saveas($path,$FormatPDF) 
        $doc.close()
        Write-Output "$($f.Name)"
        $i++

    }
    ''
    Write-Output "$i file(s) converted."
    Start-Sleep -Seconds 2 
    Invoke-Item $DestinationFolder
    $word.Quit()
    
    
}