Display text message until...

[Adny]

When the player interacts with the door (and he doesn't have the lantern) it will set the message; if the player has the lantern, the door will unlock and no longer display the message.

void OnStart()
{
SetEntityPlayerInteractCallback("NAME_OF_DOOR", "FUNC", false);
SetEntityPlayerInteractCallback("NAME_OF_LANTERN", "FUNC_2", false);
}

void FUNC(string &in asEntity)
{
if(HasItem("NAME_OF_LANTERN") == true)
{
SetMessage("NAME_OF_TEXT_CATEGORY", "NAME_OF_TEXT_ENTRY", 0);
}
}

void FUNC_2(string &in asEntity)
{
SetSwingDoorLocked("NAME_OF_DOOR", false, false); ///by having abEffects false, the player won't suddenly hear an unlocking noise
}

Hope that Helped!