[Konstantinos]

Is COLOR_YELLOW defined BEFORE SpeedHack?

It should be:

pawn Код:

#includes <a_samp>
// other includes..

#define COLOR_YELLOW 0xFFFF00AA
// others

forward SpeedHack(playerid);
public SpeedHack(playerid) {
    if(GetVehicleSpeed(GetPlayerVehicleID(playerid)) > 250)
    {
        new string[357];
        format(string, sizeof(string), "{AA3333}System{FFFF00}: %s (ID %d)  Hack Speed.", GetPlayerNameEx(playerid), playerid);
        ABroadCast(COLOR_YELLOW, string, 2);
    }
}