Use a native Lua 5.3 SDK with these headers. The example's lua_Alloc callback uses native-sized allocation counts, while a lua_CFunction returns a C 32-bit Long result count. Check lua_newstate and the script result, and release the state with lua_close after script execution.

The min/max callback starts with the first converted number. Zero is a valid input, and an all-negative list must keep a negative maximum. Invalid or missing numeric arguments raise ordinary Lua argument errors which the script can catch with pcall.

On Win64, compile GAS64 callbacks with -eunwind when a Lua error may leave the callback through native longjmp. Windows needs unwind information for those frames. This does not run FreeBASIC destructors: the callback deliberately owns no local strings or objects requiring cleanup across an error.

The native Win64 Lua 5.3.6 SDK has been checked against independent C layouts and both FreeBASIC backends. The original callback is exercised with positive, negative, zero and single-number lists, protected errors and missing-script cleanup, including its real final console keypress.