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copied!<p>The function you're looking for is WinHttpGetIEProxyConfigForCurrentUser(), which is documented at <a href="http://msdn.microsoft.com/en-us/library/aa384096(VS.85).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/aa384096(VS.85).aspx</a>. This function is used by Firefox and Opera to get their proxy settings by default, although you can override them per-browser. Don't do that, though. The right thing to do (which is what everybody else does) is to just get the IE settings and assume that they're correct, since they almost always are.</p> <p>Here's a sample of the relevant logic, which you should adapt for your needs:</p> <pre><code>if( WinHttpGetIEProxyConfigForCurrentUser( &ieProxyConfig ) ) { if( ieProxyConfig.fAutoDetect ) { fAutoProxy = TRUE; } if( ieProxyConfig.lpszAutoConfigUrl != NULL ) { fAutoProxy = TRUE; autoProxyOptions.lpszAutoConfigUrl = ieProxyConfig.lpszAutoConfigUrl; } } else { // use autoproxy fAutoProxy = TRUE; } if( fAutoProxy ) { if ( autoProxyOptions.lpszAutoConfigUrl != NULL ) { autoProxyOptions.dwFlags = WINHTTP_AUTOPROXY_CONFIG_URL; } else { autoProxyOptions.dwFlags = WINHTTP_AUTOPROXY_AUTO_DETECT; autoProxyOptions.dwAutoDetectFlags = WINHTTP_AUTO_DETECT_TYPE_DHCP | WINHTTP_AUTO_DETECT_TYPE_DNS_A; } // basic flags you almost always want autoProxyOptions.fAutoLogonIfChallenged = TRUE; // here we reset fAutoProxy in case an auto-proxy isn't actually // configured for this url fAutoProxy = WinHttpGetProxyForUrl( hiOpen, pwszUrl, &autoProxyOptions, &autoProxyInfo ); } if ( fAutoProxy ) { // set proxy options for libcurl based on autoProxyInfo } else { if( ieProxyConfig.lpszProxy != NULL ) { // IE has an explicit proxy. set proxy options for libcurl here // based on ieProxyConfig // // note that sometimes IE gives just a single or double colon // for proxy or bypass list, which means "no proxy" } else { // there is no auto proxy and no manually configured proxy } } </code></pre>

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