function ComputeMD5 ($user, $password, $digestRealm)
{
	$hash = $user + ":" + $digestRealm + ":" + $password
	$cryptoServiceProvider = [System.Security.Cryptography.MD5CryptoServiceProvider] 
	$md5Algorithm = new-object $cryptoServiceProvider
	$digestPassword = $md5Algorithm.ComputeHash([Char[]]$hash)
	return $digestPassword
}