Call this function in your control's DoPropExchange function to synchronize the value of the property with the associated property page radio button control.
void AFXAPI DDP_Radio(
Pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.
The resource ID of the radio button control associated with the control property specified by pszPropName.
The member variable associated with the property page control specified by id and the property specified by pszPropName.
The property name of the control property to be exchanged with the radio button control specified by id.
This function should be called before the corresponding DDX_Radio function call.