Changing background colour on option buttons

[fordgale]

Hi,
Is there a way to change the background colour on an Active-X Option box to something other than the pre-defined 'Backcolour' options in Properties? I have placed a Group Box over the option buttons and want to make the background behind the text of the option boxes the same colour as the background of the Group box so the box 'disappears' and only the text of the option button can be seen.

Thanks in advance for any advice.