[SCRIPT] How to appear a text message on screen?

[SilentHideButFine]

void OnStart()
{
SetEntityPlayerInteractCallback("NAME_OF_OBJECT", "MSG", false);
}

void MSG(string &in entity)
{
SetMessage("Messages", "msgname", 1); //shows the message
}
.LANG file

<CATEGORY Name="Messages"> // start the category
<Entry Name="massage">put the message text here</Entry>
</CATEGORY> // ends the category