Glad that I could help

Good luck in your future works

( btw, thx 4 k.. you deserve one too

)
Edit:
Try this:
PHP Code:
#define _myincludefile_included
#if !defined _myincludefile_included
#endinput
#endif
#include <amxmodx>
#include <amxmisc>
Second Edit:
PHP Code:
new steamid[35];
get_user_authid(id,steamid,34);
new szQuery[128];
format(szQuery, charsmax(szQuery), "SELECT * FROM `mytable` WHERE `player_steamid` = '%s'", steamid);
new player_load:res = dbi_query(mysql, szQuery);
Forgot quotes
__________________