How to make button clickable on icon only and not on label

[manishkevre]

Hi,
i am new to flex
just want that behavior which this page has while creating Tags at bottom

i  want to add sparks buttons dynamic using actionscript to a sparks container,
each button has a click event listener added on them before adding to container.
i want button to be clickable to only on icon area and not on label,
button have icon on right side and a label.
can we use custom skin for that , or any other workaround.

thanks in advance