Oracle Forms

Hi.
I'm using Oracle 10g , forms 6i, and I need capture picture through webcam.
If does anyone have one example , will be nice.
I found one exemple but doesn't work.
the code...

declare
numero number;
height number;
width number;
begin

-- COMMIT_FORM;

-- set_block_property('pessoas', default_where, 'id_pessoa ='||:pessoas.id_pessoa);
-- go_block('pessoas');
-- execute_query;

if get_item_property('controle.oc_img',visible) = 'FALSE' then

set_item_property('controle.oc_img',visible,property_true);
go_block('controle');
:parameter.p_camera :=:item('controle.oc_img').interface;
numero := videocap_dvideocap.ole_Start(:parameter.p_camera);

end if;

if get_item_property('pessoas.foto_camera',visible) = 'TRUE' then

set_item_property('pessoas.foto_camera',visible,property_false);

end if;
end;


but I have the error bad bind variable 'item('controle.oc_img').interface'

I´m using videocapdemosetup.exe..


thanks...