how to make a message appear when i interact with a door

[SilentStriker]

i have a door that's blocked on the other side, and i want it display a message the first time you try to open it.
and a door that's locked, and need a message there too.

i know how to make messages, just need to know how to make them show up when i try to open said door.

You use:

SetEntityPlayerInteractCallback(string& asName, string& asCallback, bool abRemoveOnInteraction);