If you call InternetOpen with INTERNET_OPEN_TYPE_PRECONFIG, WinINet will use these values, as explained in 'setting access types'.
You can set the proxy username and password using InternetSetOption as explained in 'proxy authentication'.
If you call InternetOpen with INTERNET_OPEN_TYPE_PRECONFIG, WinINet will use these values, as explained in 'setting access types'.
You can set the proxy username and password using InternetSetOption as explained in 'proxy authentication'.