use the extension library but error?

What should I do to solve this problem? Are there any examples of use that can be referred to?

This is the link between extension library and C: http://pic.caigoubao.cc/601048/Desktop.zip

I used VB 2010 compiled lua5.1 static library, and then compile my extension library mylib2, SZ extension library is someone else, there are JSON functions can be used:

Local SZ = require (“SZ”)

STR = “JSON”

Local a = {}

A = sz.json.decode (STR)

The function in my extension library mylib2 is written in C,any body can help me?

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