I find this macro pretty useful in my Lua code to be sure that my functions work with absolute and relative indexing... #define abs_index(L, i) \ ((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \ lua_gettop(L) + (i) + 1) How about including it into the lauxlib.h or maybe lua.h? Tom Spilman Co-owner | Programmer www.sickheadgames.com