[SilentSoul]

I guess you have already done what you want. just send this message when he connects, like

pawn Код:

enum p_data
{
    personalmsg[128]//make sure you've added this array which makes it a string later
};
new PlayerInfo[MAX_PLAYERS][p_data];
public OnPlayerConnect(playerid)
{
    new
        str[126];
    format(str, sizeof(str), "Your personal message is: %s", PlayerInfo[playerid][personalmsg]);
    SendClientMessage(playerid, -1, str);
//or show him a dialog if you want.
        ShowPlayerDialog(playerid, dialogid, DIALOG_STYLE_MSGBOX, "Personal Message", str, "Close", "");
    return true;
}

If I am wrong, please explain more. or show errors if there is any.