Editing WoW:API loadstring (section)

=== Returning values ===
Since the code block is actually a function, you can return values out of it just like with a function. ''(ignoring error handling for now)''
  local func = assert(loadstring("return 38+4, \"Hello, World!\";"));
  local sum, message = func();

You cannot pass parameters into a loadstring()ed function like you can with regular functions. But, on the other hand, you can freely modify the string itself so getting values into it is usually not a problem.