stopping screensaver without clicking

[Wayne Betts]

I have a windows machine with vnc server and a linux box running
vncviewer.  I'd very much like to enable the Windows screensaver
(without password) on the server, but at the same time I do not want the
client to be able to interact with the server (other than stopping the
screensaver).  

One way that I hoped would be implemented (but isn't apparently) might
be to separate mouse movement from mouse clicks.  If I could disable
mouse clicks, but allow mouse movement from the client, then things
would be good for my situation.  

Any suggestions?

Wayne