public OnPlayerConnect(playerid)
{
ShowPlayerDialog(playerid, 1, DIALOG_STYLE_LIST,"Rules" ,"1-Do not use hacks in server\nAlways Respect everyone","Accept","Decline");
return 1;
}

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    switch(1)
    {
        case KickBox :
        {
            if(!response)
            {
                SendClientMessage(playerid,COLOR_RED, "You Declined and have been kicked Goodbye!");
                Kick(playerid);
            }
            else
            {
                SendClientMessage(playerid,COLOR_YELLOW, "You Accepted our rules Have fun!");
                //Here you can add register dialog
            }
        }
    }
    return 1;
}