Vista - Possible to run a Powershell script with no taskbar window?

function ShowWindowAsync([IntPtr] $hWnd, [Int32] $nCmdShow)
{
    $parameterTypes = [IntPtr], [Int32] 
    $parameters = $hWnd, $nCmdShow
    Invoke-Win32 "user32.dll" ([Boolean]) "ShowWindowAsync" $parameterTypes $parameters
}
function Show-PowerShell() { 
     $null = ShowWindowAsync $myWindowHandle 1 
}
function Hide-PowerShell() { 
    $null = ShowWindowAsync $myWindowHandle  0  
}
function Minimize-PowerShell() { 
    $null = ShowWindowAsync $myWindowHandle  2  
}
# Values for $nCmdShow
#   SW_HIDE = 0;
#   SW_SHOWNORMAL = 1;
#   SW_NORMAL = 1;
#   SW_SHOWMINIMIZED = 2;
#   SW_SHOWMAXIMIZED = 3;
#   SW_MAXIMIZE = 3;
#   SW_SHOWNOACTIVATE = 4;
#   SW_SHOW = 5;
#   SW_MINIMIZE = 6;
#   SW_SHOWMINNOACTIVE = 7;
#   SW_SHOWNA = 8;
#   SW_RESTORE = 9;
#   SW_SHOWDEFAULT = 10;
#   SW_MAX = 10

 
  #must be saved before the call
$myWindowHandle = (Get-Process -Id $pid).MainWindowHandle 
start-transcript
Hide-PowerShell 
# (Get-Process -Id $pid).MainWindowHandle -eq 0
sleep 2 
 
Show-PowerShell;

 
$myWindowHandle = (Get-Process -Id $pid).MainWindowHandle 
 # PowerShell-Scripting.com - PowerShell Form Converter V0.9
...
$Form1.Add_Shown({Hide-PowerShell;$Form1.Activate()})
$Form1.ShowDialog()
 
$Form1.Dispose()
Show-PowerShell;