New-Progressbar - Example

# Get a big list of files of unknown size
$files = @(dir $env:SystemRoot | select -First (Get-Random -Minimum 10 -Maximum 100))

# Create progressbar
$bar = New-Progressbar -TotalCount $files.Count -ActivityName "Processing files"

# Pretend to process files in order to progress the progressbar
$files | foreach {
    $bar.Progress($_.Name)
    sleep -Milliseconds 100
}

# Complete the progressbar
$bar.Complete()