Sending Objects to Notepad

by Feb 12, 2016

In a previous tip we showed how you can send text to a fresh Notepad instance. Today, you get an enhanced version of Out-Notepad: you can pipe anything to Notepad now. If it is not a string, Out-Notepad uses the internal PowerShell ETS to convert it to text and show it appropriately:

#requires -Version 2
function Out-Notepad
    [Parameter(Mandatory=$true, ValueFromPipeline=$true)]

    $Width = 150

    $al = New-Object System.Collections.ArrayList

    $null = $al.Add($Object)
    $text = $al | 
    Format-Table -AutoSize -Wrap | 
    Out-String -Width $Width

    $process = Start-Process notepad -PassThru
    $null = $process.WaitForInputIdle()

    $sig = '
      [DllImport("user32.dll", EntryPoint = "FindWindowEx")]public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow)
      [DllImport("User32.dll")]public static extern int SendMessage(IntPtr hWnd, int uMsg, int wParam, string lParam)

    $type = Add-Type -MemberDefinition $sig -Name APISendMessage2 -PassThru
    $hwnd = $process.MainWindowHandle
    [IntPtr]$child = $type::FindWindowEx($hwnd, [IntPtr]::Zero, "Edit", $null)
    $null = $type::SendMessage($child, 0x000C, 0, $text)

You can pipe anything to Out-Notepad. If it is text already, it is displayed as-is:

PS C:\> Get-Content $env:windir\system32\drivers\etc\hosts | Out-Notepad

If you pipe object results, Out-Notepad converts them to text and makes sure nothing is cut off. You may want to play with the -Width parameter to choose the page width that works best for you:

PS C:\> Get-EventLog -LogName System -EntryType Error, Warning -Newest 10 | Out-Notepad -Width 130 

And you may want to maximize Notepad or disable word wrap to see the correct formatting.


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