Thank you for writing.
As to the problems at hand:
1) The AllowShowFocusCues
comes from RadControl (the base type for all controls in our suite) and you should be able to set it to RadCheckBox as demonstrates below:
2) By default the TabStop property of RadRadioButton
set to false
and to make such receive focus, you need to set it to true.
Please note that the behavior of our RadRadioButton
is the same as the standard RadioButton control, when you set the TabStop -
the radio button with the lowest TabIndex
will get a focus, but you will still not be able to tab through your group of radio buttons . The only way to navigate through the buttons is by using the up and down keyboard navigation keys. Find attached a sample video (2013-02-21_1541), where you can observe this functionality.
I hope this helps.
the Telerik team