more than 5 mouse buttons

[Hendrik Tews]

James Weatherall writes:
   
   If I remember correctly, the X11 protocol supports only five "buttons"
   natively, being left, middle, right, mousewheel-up & mousewheel-down.  VNC
   technically supports an additional three to make a total of eight, but they
   are unlikely to work with X11.
   
Yes, I had the hope that now, when nearly every mouse identifies
itself at least as a 12 Button mouse, this  button restriction
has been lifted.

Anyway, is there a way to get a Button 6 press event through vnc?

Bye,

Hendrik