title: Radio button selection change in MFC
body: <p>Using MFC  I have created a dialog, which is having  5 radio buttons. I want to get notification when some other radio-button gets selected.</p>
  
  <p>For now I get notification whenever any of the radio button is clicked. But I need to gets these notification only when there is change in the radio button.</p>
  
  <pre><code>ON_BN_CLICKED(IDC_RADIO1, &amp;CMyDlg::OnRadioButtonClicked)
  ON_BN_CLICKED(IDC_RADIO1, &amp;CMyDlg::OnRadioButtonClicked)
  ON_BN_CLICKED(IDC_RADIO1, &amp;CMyDlg::OnRadioButtonClicked)
  ON_BN_CLICKED(IDC_RADIO1, &amp;CMyDlg::OnRadioButtonClicked)
  ON_BN_CLICKED(IDC_RADIO1, &amp;CMyDlg::OnRadioButtonClicked)
  </code></pre>
  
  <p>Thanks</p>