Configure for user input

How can I configure Wyse Thinclients to just put a RDP icon on desktop, and when user opens this icon, asks for server, login, password and domain?

I try this but doesn't work...

connect=rdp \
host="" \
Logon_mode=prompt\
icon=default \
Fullscreen=yes \
Reconnect=no \
Disablesound=no \
Autoconnect=no