Simple Export Dll Example

SimpleExportExampleDll.cpp

#include "pch.h"
#define EXPORT extern "C" __declspec(dllexport)

EXPORT void HelloWorld()
{
    MessageBox(0, L"Hello World!", 0, 0);
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD  ul_reason_for_call, LPVOID lpReserved)
{
    switch (ul_reason_for_call)
    {
        case DLL_PROCESS_ATTACH:
            HelloWorld();
            break;
        case DLL_THREAD_ATTACH:
            break;
        case DLL_THREAD_DETACH:
            break;
        case DLL_PROCESS_DETACH:
            break;
    }
    return TRUE;
}