THE WINBOX LOGIN DIARIES

I need to know if And the way I am able to put up a message the moment a person logs on to a mikrotik working with winbox, to mention a little something arb like "remember to do not fiddle Using these options etcetera"I have a dozen or so RB3011 routers in company and also have GRE tunnels to every from our principal place. But After i open Winbox