On a Form I have a wbrowser:TWebBrowser .And I load an e-mail login site, for example mail.yahoo.com. Then the html code has a part <form name=Login_form action=post...> the username is placed in <input type=... name=usern> the password is in <input type=password name=pass> And there is a submit buton <input type=... name=Submit My Question is : Can You tell me in RUN-Time ,How to place the username and password stores in (var a,b:String) into the html and then invoke the event Clicking on the Submit button. Thanks To Anyone Who help me. Spent