[Miguel]

pawn Код:

CMD:megaphone(playerid, params[])
{
  if(!isnull(params))
  {
    new string[128];
    format(string, sizeof(string), "Megaphone: %s", params);
    SendClientMessageToAll(COLOR, string);
  }
  return 1;
}

A pretty simple example. http://forum.sa-mp.com/index.php?topic=116240.0