A powershell menu

menu.ps1

function menu($items, $HighlightColor = "Yellow", [Switch]$ReturnIndex, [Switch]$MultiSelect) {
  $selected=@()
  :w while ($true) {
    # prevent overflow 
    $pos = if ($null -eq $pos -or $pos -lt 0) { 0 } else { [Math]::Min($pos, $items.Length-1) } 
    # draw
    $i=0
    $items | ForEach-Object {
      $x = if (-not $MultiSelect) { "" } elseif ($selected -contains $i) { " [x]" } else { " [ ]" } 
      if ($i++ -eq $pos) { Write-Host ">$x $_" -ForegroundColor $HighlightColor } 
      else               { Write-Host " $x $_"  }
    }
    # move
    switch ($host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown").VirtualKeyCode) {
      27 { return $null } #escape
      { 38,75 -eq $_ } { $pos-- } #down,j
      { 40,74 -eq $_ } { $pos++ } #up,k
      { 13,32 -eq $_ } { #space,enter
        if (-not $MultiSelect -or 32 -eq $_) {
          $selected =
            if ($selected -contains $pos) { $selected | Where-Object { $_ -ne $pos } }
            else { @($selected) + @($pos) }
        }
        if (-not $MultiSelect -or 13 -eq $_) { break w }
      } 
    }
    # go to top
    [System.Console]::SetCursorPosition(0, [System.Console]::CursorTop - $items.Length)
  }
  return $(if ($ReturnIndex) { $selected } else { $items[$selected] })
}