(PowerShell) Synchronize Remote Directory Tree

Uploads a directory tree from the local filesystem to the FTP server. Synchronization modes include:

mode=0: Upload all files
mode=1: Upload all files that do not exist on the FTP server.
mode=2: Upload newer or non-existant files.
mode=3: Upload only newer files. If a file does not already exist on the FTP server, it is not uploaded.

Download: Chilkat .NET Assemblies

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll")

$ftp = New-Object Chilkat.Ftp2

#  Any string unlocks the component for the 1st 30-days.
$success = $ftp.UnlockComponent("Anything for 30-day trial")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$ftp.Hostname = "ftp.chilkatsoft.com"
$ftp.Username = "***"
$ftp.Password = "***"

$ftp.KeepSessionLog = $true

#  Connect and login to the FTP server.
$success = $ftp.Connect()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

#  Set the current remote directory to the root of
#  the tree where files are uploaded.
$success = $ftp.ChangeRemoteDir("/abc123")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

#  Recursively upload all non-existant and newer files.
$mode = 2
$success = $ftp.SyncRemoteTree("c:/temp/abc123",$mode)
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$ftp.Disconnect()

#  Display the session log.
$($ftp.SessionLog)