Programmatically select an MFC radio button

Question

When I'm initializing a dialog, I'd like to select one of the radio buttons on the form. I don't see a way to associate a Control variable using the Class Wizard, like you would typically do with CButtons, CComboBoxes, etc...

Further, it doesn't like a CRadioButton class even exists.

How can I select one of the several radio buttons?

Answer 1

Radio buttons and check buttons are just buttons. Use a CButton control and use GetCheck/SetCheck.

Answer 2

Use CWnd::CheckRadioButton to set select one button in a group and CWnd::GetCheckedRadioButton to retrieve the ID of the selected button. Be sure to call these methods on your dialog object, and not any of the radio button objects.

Answer 3

Going on what mos said, the following worked did the trick:

CButton* pButton = (CButton*)GetDlgItem(IDC_RADIOBUTTON);
pButton->SetCheck(true);

Answer 4

void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
  ...
  DDX_Radio(pDX, IDC_RADIO1, m_Radio);
  ...
}

but it is the same thing Wizard generates

Answer 5

You can use this one-liner:

::SendMessage(GetDlgItem(IDC_RADIO1)->m_hWnd, BM_SETCHECK, BST_CHECKED, NULL);