I want to know that when i add a GWT-EXT button to the toolbar it appears as if it were a link,you can see the border is not visible and it just got blended with the toolbar .

However when add the same button to the panel it viewed properly.

I just want the button when it is added to to toolbar of a panel to be exactly similar when it is added to a panel.
go the that button and write listener,
This will resolve your problem