The topic currently only mentions script-block-based ETS members and PowerShell classes.

A quick demonstration:

Add-Type -AssemblyName System.Windows.Forms
$form = New-Object System.Windows.Forms.Form
$timer = new-object System.Windows.Forms.Timer
$timer.Add_Tick( { 
  param([object] $sender, [eventargs] $evArgs) 
  Write-Verbose -Verbose ('$this equals $sender? ' + [object]::ReferenceEquals($this, $sender));
  $form.Close() 
})
$timer.Interval = 10; $timer.Enabled = $true
$null = $form.ShowDialog()
$form.Dispose(); $timer.Dispose()

The above yields: VERBOSE: $this equals $sender? True

Document Details

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• ID: 31c08e06-a43b-4cff-e8cd-f40fe12612b2
• Version Independent ID: 901506c9-d895-9a5b-331f-7b332fc5e827
• Content: about Automatic Variables - PowerShell
• Content Source: reference/7.1/Microsoft.PowerShell.Core/About/about_Automatic_Variables.md
• Product: powershell
• Technology: powershell-conceptual
• GitHub Login: @sdwheeler
• Microsoft Alias: sewhee