Requiring C++ DLL from Lua gives an error - c++

Question

I am trying to compile C++ code to a DLL file to use with Lua. To do this, I am using Visual Studio 2022 with Windows 10. My goal is to use the Lua require(modname) function to require my DLL and use the C++ methods in Lua. For now the DLL and the main.lua files are in the same directory. What is actually happening is that I get an error message saying:
error loading module 'lgf' from file 'lgf.dll': The specified module could not be found.
with the Lua code:
package.cpath = "?.dll;"..package.cpath
create = require("lgf")
My main.cpp file contains the following:
#include <iostream>
#include <string>
#include <window/include/window.hpp>
#include <font/include/font.hpp>
#include <image/include/image.hpp>
#include <keyboard/include/keyboard.hpp>
#include <mouse/include/mouse.hpp>
#include <rectangle/include/rectangle.hpp>
#include <lua/lua.hpp>
#define LIB
SDL_Window* sdlWin;
SDL_Renderer* sdlRen;
window win(sdlWin, sdlRen);
static const luaL_Reg lib[] = {
{"create", window::create},
{"isCloseRequested", window::isCloseRequested},
{"sync", window::sync},
{"update", window::update},
{"setVSync", window::setVSync},
{"setIcon", window::setIcon},
{"clearScreen", window::clearScreen},
{"render", window::render},
{"windowChangeColor", window::changeColorRGB},
{"close", window::close},
{"createRectangle", rectangle::create},
{"changeRectangleColor", rectangle::changeColor},
{"drawRectangle", rectangle::draw},
{"mouseButtonUp", Mouse::mouseButtonUp},
{"mouseButtonDown", Mouse::mouseButtonDown},
{"keyup", Keyboard::keyup},
{"keydown", Keyboard::keydown},
{"loadImage", ImageLoader::loadImage},
{"drawImage", ImageLoader::drawImage},
{"loadFont", FontLoader::loadFont},
{"loadText", FontLoader::loadText},
{"renderText", FontLoader::renderText},
{NULL, NULL}
};
extern "C" __declspec(dllexport) int luaopen_lgf(lua_State* L) {
luaL_newlib(L, lib);
return 22;
}
I am creating a simple graphics library. My dependencies are SDL2 and (of course) Lua.
I have tried creating an entry point (main) for the file, and I still get the same message. Let me know if I should include my other .cpp files in here.