Thanks Vikoras, this does look encouraging. Graham On Wed, 05 Mar 2008 10:57:19 +0200, viktoras didziulis <viktoras at ekoinf.net> wrote: > > you might also be interested to read Universal Serial Bus - the > easy way > (4 pages) and virtual com port drivers described at: > http://www.dlpdesign.com/usb-easy-way.pdf > > > Best regards > Viktoras