Prevent an item to be highlighted in TileList

[mark goldin]

Can some please explain how I can stop highlighting of an item in the
TileList? I am attaching pictures that illustrate it.
One picture shows top ab bottom border when I click on the item. The other
shows what happens when I move a mouse over.

My TileList is something like this:
<mx:TileList name="projectItemTileList" backgroundColor="3158064"
direction="horizontal"
borderStyle="none" width="100%"
dataProvider="..........">
<mx:itemRenderer>
<mx:Component>
<mx:Canvas>
<mx:HBox>
<mx:TextArea text="1234567890" width="125" height="125" editable="false">
</mx:TextArea>
</mx:HBox>
</mx:Canvas>
</mx:Component>
</mx:itemRenderer>
</mx:TileList>

Please, help.

Thanks