Getting Managed Account Password via Power Shell

I ve found this command in msdn, I could not find the link, though.

If you set changing the account password via sharepoint (automatically), you can get the managed account password by using below commands.

Get Managed Account Passwords vıa Power Shell:

function Bindings()
{
    return [System.Reflection.BindingFlags]::CreateInstance -bor
    [System.Reflection.BindingFlags]::GetField -bor
    [System.Reflection.BindingFlags]::Instance -bor
    [System.Reflection.BindingFlags]::NonPublic
}
function GetFieldValue([object]$o, [string]$fieldName)
{
    $bindings = Bindings
    return $o.GetType().GetField($fieldName, $bindings).GetValue($o);
}
function ConvertTo-UnsecureString([System.Security.SecureString]$string) 
{ 
    $intptr = [System.IntPtr]::Zero
    $unmanagedString = [System.Runtime.InteropServices.Marshal]::SecureStringToGlobalAllocUnicode($string)
    $unsecureString = [System.Runtime.InteropServices.Marshal]::PtrToStringUni($unmanagedString)
    [System.Runtime.InteropServices.Marshal]::ZeroFreeGlobalAllocUnicode($unmanagedString)
    return $unsecureString
}

Get-SPManagedAccount | select UserName, @{Name="Password"; Expression={ConvertTo-UnsecureString (GetFieldValue $_ "m_Password").SecureStringValue}}