[Roach_]

This should totally work :

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    new veh = GetPlayerVehicleID(playerid);
    if(newkeys & KEY_SUBMISSION)
    {
        if(veh != bus1 || veh != bus3 || veh != bus2) return SendClientMessage(playerid, COLOR_RED,"You Have To Be In A Bus To Start The Mission!");
        if(IsBusJob[playerid]) return 0;
        
        SendClientMessage(playerid, LIME, "You started working for the bus company!"); // SCM only one time cause the variable under here.
        IsBusJob[playerid] = 1; // here's the variable set to 1, this will prevent the player from starting working over again.
        busdriver[playerid] = 1;
        SetPlayerCheckpoint(playerid, buspoint1, 3.0);
        GameTextForPlayer(playerid, "~g~Bus Driver Started!", 3000, 3);
        new name[MAX_PLAYER_NAME], string[48];
        GetPlayerName(playerid, name, sizeof name);
        format(string, sizeof string, "%s Is Now A Bus Driver!.", name );
        SendClientMessageToAll(LIME, string);
    }
    return 1;
}