I'm setting GroupIndex property of TAdvGlowButton to a value different than 0 (Style = bsCheck). The buttons should behave just like radio buttons but they're not - I can set to Down state every of them. Please check this out.
The style must be bsButton in order for GroupIndex to work.
But still - if I have an action attached to those buttons - the GroupIndex doesn't work. Please keep that in mind.
Ops, it's overriden by action's GroupIndex - so don't keep that in mind. Everything works fine :)