// "追加"ボタン押下
void CListCtrl2Dlg::OnBnClickedBtnAdd()
{
    LVITEM        lvi;
    int           index;
    int           err = 0;

    UpdateData();
    if (m_xvEditName.IsEmpty() || m_xvEditPrice.IsEmpty()) err = 1;
    // 商品名
    if (!err)
    {
        lvi.mask = LVIF_TEXT | LVIF_PARAM;
        lvi.iItem = 0;
        lvi.lParam = m_id++;        // ID
        lvi.iSubItem = 0;
        lvi.pszText = const_cast<LPTSTR>(static_cast<LPCTSTR>(m_xvEditName));
        if ((index = m_xcList.InsertItem(&lvi)) == -1) err = 1;
    }
    // 単価
    if (!err)
    {
        lvi.mask = LVIF_TEXT;
        lvi.iItem = index;
        lvi.iSubItem = 1;
        lvi.pszText = const_cast<LPTSTR>(static_cast<LPCTSTR>(m_xvEditPrice));
        if (!m_xcList.SetItem(&lvi)) err = 1;
    }
    return;
}

// "ID取得"ボタン押下
void CListCtrl2Dlg::OnBnClickedBtnGet()
{
    int            index = -1;
    CString        str;
    
    while ((index = m_xcList.GetNextItem
        (index, LVNI_ALL | LVNI_SELECTED)) != -1)
    {
        str.Format(_T("のIDは%dです。"), m_xcList.GetItemData(index));
        str = m_xcList.GetItemText(index, 0) +str;
        MessageBox(str);
    }
    return;
}