Casting void * in IWebBrowser2



Hello,
I need to cast a IWebBrowser2 in void *.
I did it:

void *pBrowser = NULL;
CComQIPtr<IWebBrowser2, &IID_IWebBrowser2> spWebBrowser2;

pBrowser = (LPVOID)spWebBrowser2;

now, I would like getting the IWebBrowser2 with my pointer pBrowser:
The Idea is:
spWebBrowser2 = pBrowser; ??????

How can I do it ?

Thx

.