Oracle Forms

Hello,
Please suggest us how to change the cursor style.we are beginners in java hence we are unable to use Beans .
We have created buttons and text items in our forms.When move the cursor over it or when cursor enters it we want the default cursor to change to say 'Hand'
we have attached at block level when_mouse_enter trigger and written
set_application_property(cursor_style,'HAND');
There is no change in the cursor style.
Please suggest how to proceed.

Thanks