COMMAND: @enter <object> = <message>
Sets the message that a player sees when entering an object or room, whether by using an exit, the enter or leave commands, or by teleporting.
Function references and %-substitutions are allowed in enter messages, and are evaluated when someone enters the object. In function references, 'me' refers to the object being entered, while %-substitutions that refer to the enactor (such as %n, %#, %p, etc) refer to the player entering the object.
This attribute is meaningful for players, things, and rooms, and will never be automatically triggered on exits.
Example: @enter car = You climb into the car and buckle your seatbelt.