Automatic completion feature is disabled by default in the browser control (but no document refers to this ...), but you can set the DOCHOSTUIFLLAG_ENABLE_FORMS_AUTOCHOSTUIFL_ENABLE_FORMS_AUTOCHOSTUIFL_ENABLE_FORMS_AUTOCHOSTUIFL_Enable_Forms_AUTOCHOSTUIFL_Enable_Forms_AutOChostuiFL_Enable_Forms_AutOComplete Identity when you fill the DOCHOSTUIInfo structure.
About how to implement idochostuihandler, you can refer to http://www.9cbs.net/develop/Article/19/19627.shtm, sample project in http://www.9cbs.net/develop/Article/21/21702.shtm
My previous efforts can be seen in http://blog.joycode.com/jiangsheng/posts/3593.aspx, is an attempt to call ISHELLUIHELPER :: AutoCompleteTTatch, but this unapproved method does not work.
