No, it also uses NetBios(), which actually means it uses mailslots. The "net send" thing is there since the very first days of Windows for Workgroups and interoperable between all OS that support SMB (they all use the same mailslot for it). -- Daniel Lohmann http://www.losoft.de (Hey, this page is worth looking! You can find some free and handy NT tools there :-D )