hiding windows using the control menu

help!!
i have a form with one root window and multiple subwindows.

i was hoping to use a when_window_closed trigger for closing all the subwindows.

this is my code.
/**************************/

declare dummy varchar2(40);

begin
dummy := :system.event_window;
message(dummy);

if :system.event_window != 'root_window' then  set_window_property('name_in(:dummy)',visible,property_off);  go_block('contract');
end if;

end;
/**************************/

i keep getting an invalid window_id error. if i hardcode in the window name, instead of using the name_in, it works fine.

any ideas? Received on Fri Mar 10 1995 - 23:24:11 CET