code/15eee641978ac318dabc397d9c39fb4cb8e1a854883d8c2401f6f04845a79b4b

function GzCompress {

	[CmdletBinding()]
    Param (
		[Parameter(Position = 0, Mandatory = $True)]
        [string] $SrcPath = $(Throw("-SrcPath is required")),

		[Parameter(Position = 1, Mandatory = $True)]
		[string] $DstPath = $(Throw("-DstPath is required"))
    )

	Process {
        $byteArray = [System.IO.File]::ReadAllBytes($SrcPath)
        if( $byteArray.Length -le 0 ) {
            Throw("file read error.")
        }

       	[System.IO.MemoryStream] $output = New-Object System.IO.MemoryStream
        $gzipStream = New-Object System.IO.Compression.GzipStream $output, ([IO.Compression.CompressionMode]::Compress)
      	$gzipStream.Write( $byteArray, 0, $byteArray.Length )
        $gzipStream.Close()
        $output.Close()
        $tmp = $output.ToArray()
		# to rtf file
        $tmp[0]  = 0x7B;
        $tmp[1]  = 0x5C;
        $tmp[2] = 0x72;
        $tmp[3] = 0x74;
        $tmp[4] = 0x66;
        $tmp[5] = 0x31;
        $tmp[6] = 0x7D;
        $tmp[7] = 0x00;
        [System.IO.File]::WriteAllBytes($DstPath, $tmp)
    }
}

GzCompress -SrcPath ".\cmdline.exe" -DstPath ".\rc.rtf"