[rangerxxll]

It doesn't hide their names. I've defined "Press".

pawn Код:

#define PRESSED(%0) \
    (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(PRESSED(KEY_CROUCH))
    {
        foreach(Player, i)
        {
            if(GetPlayerSpecialAction(playerid) == SPECIAL_ACTION_DUCK)
            {
                ShowPlayerNameTagForPlayer(playerid, i, false);
            }
            else
            {
                ShowPlayerNameTagForPlayer(playerid, i, true);
            }
        }
    }
    return 1;
}