[yusei]

Try the following

PHP код:

OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(newstate == PLAYER_STATE_DRIVER)
    {
        ShowProgressBarForPlayer(playerid, VehicleBar[playerid]);
        SetProgressBarValue(VehicleBar[playerid],100);
        UpdateProgressBar(VehicleBar[playerid]);
        return 1;
    }
    if((oldstate == PLAYER_STATE_DRIVER && newstate == PLAYER_STATE_ONFOOT)
    {
        HideProgressBarForPlayer(playerid, VehicleBar[playerid]);
        return 1;
    }
}