How to execute R-keys in virtuoso xl?

Hi All,
I have a layout binkey listed just like the following.
list("<Key>R11" "geScroll(nil \"\" nil)")
list("<Key>R13" "geScroll(nil \"sw\" nil)")
list("<Key>R15" "geScroll(nil \"se\" nil)")
in my virtuoso, but I don't know how to execute these.
How to execute R-key?
Please help.

Best regards,
Marben