binpipe.ps1

function CompressBuffer
{
    Param(
       [Parameter(Mandatory=$true)]
       [Array]$Buffer
    ) 
    $inBuffer = [Byte[]] $Buffer
    $staticBuffer = New-Object Byte[]($inBuffer.Length)
    $inBuffer.CopyTo($staticBuffer, 0)
    $compressedStream = New-Object IO.MemoryStream
    $gZipper = New-Object IO.Compression.GZipStream -ArgumentList @(
               $compressedStream, [IO.Compression.CompressionMode]::Compress)
    $gZipper.Write($staticBuffer, 0, $staticBuffer.Length)
    $gZipper.Close()
    $compressedBuffer = $compressedStream.ToArray()
    $compressedStream.Close()
    return $compressedBuffer
}
 
function DecompressBuffer
{
    Param(
       [Parameter(Mandatory=$true)]
       [Array]$Buffer
    ) 
    $uncompressedStream = New-Object IO.MemoryStream
    $compressedStream = New-Object IO.MemoryStream -ArgumentList @(,$Buffer)
    $gUnzipper = New-Object IO.Compression.GZipStream -ArgumentList @(
                 $compressedStream, [IO.Compression.CompressionMode]::Decompress)
    $gUnzipper.CopyTo($uncompressedStream)
    $uncompressedBuffer = $uncompressedStream.ToArray()
    $gUnzipper.Close()
    $compressedStream.Close()
    $uncompressedStream.Close()
    return $uncompressedBuffer
}

function myFunc
{
    param([Diagnostics.ProcessStartInfo] $psi, [Array] $BytesIn) 

    $buf = New-Object Char[](1024)
    $psi.WorkingDirectory = (Get-Location).Path 
    $psi.UseShellExecute = $false 
    if($BytesIn) {$psi.RedirectStandardInput  = $true}
    $psi.RedirectStandardOutput = $true 
    #$psi.RedirectStandardError  = $true 

    $process = [System.Diagnostics.Process]::Start($psi) 
    if($BytesIn) {
        $process.StandardInput.Write($BytesIn)
    }

    do
    {
        Start-Sleep 1
        $done = $process.HasExited
        if(-not $e -and $process.StandardError) {
        $e = $process.StandardError.ReadToEndAsync() }
        if(-not $o -and $process.StandardOutput) {
        $o = $process.StandardOutput.ReadToEndAsync() }
    }
    until($done)
    
    $process.StandardInput.Close()
    $process.StandardError.Close()
    $process.StandardOutput.Close()

    return ($out, $err)
}

$processStartInfo = New-Object System.Diagnostics.ProcessStartInfo 
$processStartInfo.FileName  = "robocopy.exe"
$processStartInfo.Arguments = @(,"/?")
myFunc $processStartInfo