how can fill browser fields direct from vb6 and sumbit

hi,i send my descriptoin in this image :



any sample vb6 to i can fill my field from vb6 form's some fields into opened url in a browser like as firefox or chrome and then submit?
(that page is a logined page, if want use webbrower inside vb6 from so it be use like ie default browser and some scripts or ... not worked and importants is logined need too so it not work correcly but i logined in external page and i i want just fill that fields and submit

and if i want post data like as winhttp or ... ,its complicated because that page used wordpress or ... and i cant access to post informations.


i need some samples for solve this problem like as fill or post data if possible.
for example how find that field object opened in firefox and fill it direct from vb like as send string or ....