Listing 1: Get-Usage.ps1
Param([switch]$Verbose)

function RemoveCommonParameters($string)
{
" [-Verbose]"," [-Debug]"," [-ErrorAction <ActionPreference>]", `
  " [-ErrorVariable <String>]", " [-OutVariable <String>]", `
  " [-OutBuffer <Int32>]", " [-Confirm]", " [-WhatIf]" |
  ForEach-Object { $string = $string.Replace($_, [string]::Empty)}
  return $string
}

foreach($arg in $args)
{
  $cmd = Get-Command $arg
  switch ($cmd.CommandType ) {
    Alias {
      # ------- BEGIN CALLOUT A -------
      $usage = $cmd.ResolvedCommand.Definition
      $usage = $usage.Replace($cmd.ResolvedCommandName, $arg)
      # ------- END CALLOUT A -------
    }
    # ------- BEGIN CALLOUT B -------
    default { $usage = $cmd.Definition}
    # -------END CALLOUT B -------
  }
  # ------- BEGIN CALLOUT C -------
  if(!$Verbose){$usage = RemoveCommonParameters($usage)}
  # ------- END CALLOUT C -------
  $usage
}