[Lorenc_]

"SetTimerEx("CheckPlayerStatsKeys", 200, 1, "d", playerid);"

What's wrong with OnPlayerKeyStateChange?

pawn Code:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys & KEY_FIRE) return CloseStatsBox(playerid);
    return 1;
}

Think more effectively rather than a 200 Millisecond timer..

Using one include for something rather small is frankly quite pointless.
Doing this will make a 8 bit array without any includes.

I present, the char array!

pawn Code:

new 
    bool: isstatsShowed [ MAX_PLAYERS char ]
;
#define StatsShowed(%1) (isStatsShowed{(%1)}=true)
if(StatsShowed(playerid)) return HideStats(playerid);

So on..