Oracle Forms Title Bar size Changing

Oracle Form 10g Title Bar size reducing or push to smart bar by using following code

At new form instance :

SET_WINDOW_PROPERTY('WINDOW0',WINDOW_STATE,MAXIMIZE);

SET_WINDOW_PROPERTY('WINDOW0',HEIGHT,GET_WINDOW_PROPERTY('MYWINDOW',HEIGHT)+18);

SET_WINDOW_PROPERTY('WINDOW0',POSITION,0,-18);

set_window_property(forms_mdi_window,window_state,maximize);