MainDLL

 #include <windows.h>

extern void Main(void);

::BOOL WINAPI DllWork(__in::HMODULE hModule) {
    Main();
    return true;
}

::BOOL WINAPI DllMain(__in::HMODULE hModule, __in::DWORD dwReason, __in __reserved::LPVOID lpvReserved) {
    ::HANDLE hThread = NULL;
    if (dwReason == DLL_PROCESS_ATTACH) {
        if ((hThread = ::CreateThread(NULL, 0, (::LPTHREAD_START_ROUTINE) & DllWork, (::HMODULE)hModule, 0, NULL)) == NULL) {
            return FALSE;
        }
        if (::CloseHandle(hThread) == FALSE) {
            //do nothing
        }
    }
    return TRUE;
}