HOW to load self-DLL with sqlite3 func compiled by minGW GCC in LUA?

HOW to load self-DLL with operating sqlite3 func compiled by minGW GCC in LUA ,but not for using lsqite3 directly ?

i am using lua to load a func from my compiled Dll by mingw Gcc and it's all right with testing simple example such as add(1+2) ,sub ETC. but when i added any code involved with SQLITE3 func in GCC to build the Dll , it is not work for LUA calling although compiled successfully in GCC. so i am confused that what the problem is . I appreciate if anyone can answer this odd issue.