IWebBrowser2 InterfaceThis interface enables applications to implement an instance of the WebBrowser control (Microsoft ActiveX control) or control an instance of the InternetExplorer application (OLE Automation). Note that not all of the methods listed below are supported by the WebBrowser control.The IWebBrowser2 interface derives from IDispatch indirectly. IWebBrowser2 derives from IWebBrowserApp, which in turn derives from IWebBrowser, which finally derives from IDispatch. MSDN 中的原文.
急呀,我也有点不甘心
IE=IWebBrowser2
IWebBrowser2 :PUBLIC IWebBrowserApp
IWebBrowserApp :PUBLIC IWebBrowser
XMLhttp 方面的接口要用到IWebBrowser2