OnFcous AdvToolButton

Using the script events of the tool button, is there a way to change the color of the background when the control receives focus (onFocus) and loses focus (onBlur). I have worked out I can change the font color using BUTTONNAMEvalue.style values but can't seem to be able to change the background. A call to atb_action seems to do nothing as I am probably passing the wrong object??

 
Thanks

Unfortunately this is currently not supported.
However this is a good suggestion and we'll consider adding this in a future version of the IWAdvToolButton.