a problem about "HRESULT IWebBrowser2::get_HWND(long *pHWND);"

[benben]

Hi: I make a programme based on IWebBrowser2(or chtmlview).In MSDN, it says that: this function "Retrieves the handle of the Microsoft® Internet Explorer main window.".but I want to overwrite this function to let it return my main window（otherwise in my programme ,it always return NULL）.how could I do? Thanks. Benben