MFC复选框的使用

//给复选框创建关联变量,并给默认值
    pCheck1 = (CButton*)GetDlgItem(IDC_CHECK1);
    pCheck2 = (CButton*)GetDlgItem(IDC_CHECK2);
    pCheck3 = (CButton*)GetDlgItem(IDC_CHECK3);
    pCheck4 = (CButton*)GetDlgItem(IDC_CHECK4);
    pCheck1->SetCheck(1);

//复选框
void CDialogDlg::OnButton2() 
{
    // TODO: Add your control notification handler code here
    CString str;
    m_CheckState = 0;
    m_CheckState += pCheck1->GetCheck();
    m_CheckState +=(pCheck2->GetCheck());
    m_CheckState +=(pCheck3->GetCheck());
    m_CheckState +=(pCheck4->GetCheck());
    str = ‘0‘+m_CheckState;
    MessageBox(str);
    
}