MFC radio button settings are selected by default

We assume that there are two RADIO controls: Idc_radio_single and Idc_radio_range, and our goal is to use the default selection of Idc_radio_single controls.

Method One:

Checkradiobutton (Idc_radio_single,idc_radio_range,idc_radio_single);

Method Two:

Set Idc_radio_single to have group attribute, idc_radio_range not;

CTRL + Double-click the Idc_radio_single button to add a member variable m_radio to it;

Add the following code when initializing radio:

m_radio=0;

UpdateData (FALSE);

Method Three:

cbutton* radio= (cbutton*) GetDlgItem (Idc_radio_single);

Radio->setcheck (1);

Or is the third way to be in favor of AH. This is also one of the common methods of accessing controls.