Code:

typedef ULONG (FAR PASCAL *MAPIFUNC) (LHANDLE lhSession, ULONG ulUIParam,
                                      lpMapiMessage lpMessage, FLAGS flFlags,
                                      ULONG ulReserved);
const HINSTANCE hMAPILib = LoadLibrary("MAPI32.DLL");

    if (hMAPILib)
    {
        MAPIFUNC lpMAPISendMail = (MAPIFUNC) GetProcAddress(hMAPILib, "MAPISendMail");

        if (lpMAPISendMail != NULL)
        {
            MapiMessage Msg;
            memset(&Msg, 0, sizeof(Msg));
            Msg.lpszSubject  = "subject poruke";
            Msg.lpszNoteText = "telo poruke";
            ULONG Error = lpMAPISendMail(NULL, NULL, &Msg, (FLAGS) (MAPI_LOGON_UI | MAPI_DIALOG), 0);
            if (Error != SUCCESS_SUCCESS) {
                AfxMessageBox("Mail sending failed or cancelled!", MB_OK | MB_ICONEXCLAMATION);
            }
        }
    FreeLibrary(hMAPILib);
    }