[Accord]

Yes, it's certainly possible and here is an example:

Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
	if(newkeys == KEY_FIRE)
	{
	    new Float:p[3];
	    GetPlayerPos(playerid, p[0], p[1], p[2]);
	    for(new i = 0; i < MAX_PLAYERS; i++)
	    {
	        if(!IsPlayerInRangeOfPoint(i, 10, p[0], p[1], p[2])) continue;
	        SetPlayerHealth(i, 100.0);
	    }
	}
	return 1;
}

(In this case you will heal everyone whoever is in a range of 10 meters far away.)