For the LAf developers that want to have transparent with no border buttons, I see that some people try to use the FunButton PJC (oracle.forms.fd.FunButton), that is not designed to do it. The FunButton has been created to render buttons that have a non-rectangular shape.
If you want to have a nice iconic button with no border and transparent background, set the Forms Push Button Implementation Class to :
oracle.forms.fd.LAF_XP_Button, the use the following code:
-- Transparent iconic EXIT button --
Set_Custom_Property( 'LAF_BLOCK.PB1',1, 'SET_IMAGE', '/target-32.gif');
Set_Custom_Property( 'LAF_BLOCK.PB1',1, 'SET_BACKGROUND_COLOR', 'null');
Set_Custom_Property( 'LAF_BLOCK.PB1',1, 'SET_BORDER', 'false');
Francois