Exposing C++ methods to lua

[Rick]

If we have the lua state in C++, then I would expect that I could then expose a C++ method to use in lua using:

 

static int KattSendMessage(lua_State* L)
{
char* _msg = (char*)lua_tostring(L, 1);
char* _extra = (char*)lua_tostring(L, 2);

return 1;
}

BP L = GetLuaState();

lua_register((lua_State*)L, "KattSendMessage", KattSendMessage);

 

But that doesn't seem to work. My function never seems to get called and I also notice that when I save a script in the script editor that comes with the editor it always complains about KattSendMessage() being a nil value. I can do this with normal lua and it works. What would be different?