private static string GetProxyString(PerConnectionOption optionToCheck)
{
InternetPerConnectionOption returnOption = GetInternetConnectionOption(optionToCheck);
string proxyInfo = Marshal.PtrToStringAuto(returnOption.value.valuePtr);
return(proxyInfo);
}
public static bool SetInternetProxy(bool enableProxy, string proxyServerString, string proxyBypass,
bool autoDetectSettings, bool useAutoConfigureScript, string autoConfigureScript)
{
InternetPerConnectionOption[] options = new InternetPerConnectionOption[4];
options[0].option = PerConnectionOption.INTERNET_PER_CONNECTION_FLAGS;
if (autoDetectSettings)
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_AUTO_DETECT;
}
if (useAutoConfigureScript)
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_AUTO_PROXY_URL;
}
if (enableProxy)
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_PROXY;
}
else
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_DIRECT;
}
options[1].option = PerConnectionOption.INTERNET_PER_CONNECTION_AUTOCONFIG_URL;
options[1].value.valueInt = Marshal.StringToHGlobalAuto(autoConfigureScript).ToInt32();
options[2].option = PerConnectionOption.INTERNET_PER_CONNECTION_PROXY_SERVER;
options[2].value.valueInt = Marshal.StringToHGlobalAuto(proxyServerString).ToInt32();
options[3].option = PerConnectionOption.INTERNET_PER_CONNECTION_PROXY_BYPASS;
options[3].value.valueInt = Marshal.StringToHGlobalAuto(proxyBypass).ToInt32(); // Marshal.StringToCoTaskMemAuto(proxyBypass);
return(CallInternetSetOption(options));
}
public static bool SetAutoConfigURL(string autoConfigScriptURL)
{
InternetPerConnectionOption[] options = new InternetPerConnectionOption[1];
options[0] = new InternetPerConnectionOption();
options[0].option = PerConnectionOption.INTERNET_PER_CONNECTION_AUTOCONFIG_URL;
options[0].value.valueInt = Marshal.StringToHGlobalAuto(autoConfigScriptURL).ToInt32();
return(CallInternetSetOption(options));
}
private static bool CheckProxyFlag(PerConnectionFlags proxyFlagToCheck)
{
InternetPerConnectionOption returnOption = GetInternetConnectionOption(PerConnectionOption.INTERNET_PER_CONNECTION_FLAGS);
// Since this returns an int that contains the value of many flags
// we need to AND the value against what we're looking for and
// then compare it against our value if it returns true it was set.
int andValue = returnOption.value.valueInt & (int)proxyFlagToCheck;
return(andValue == (int)proxyFlagToCheck);
}
private static InternetPerConnectionOption GetInternetConnectionOption(PerConnectionOption pco)
{
//Allocate the list and option.
InternetPerConnectionOptionList perConnOptList = new InternetPerConnectionOptionList();
InternetPerConnectionOption ico = new InternetPerConnectionOption();
//pin the option structure
GCHandle gch = GCHandle.Alloc(ico, GCHandleType.Pinned);
//initialize the option for the data we want
ico.option = pco;
//Initialize the option list for the default connection or LAN.
int listSize = Marshal.SizeOf(perConnOptList);
perConnOptList.size = listSize;
perConnOptList.connection = IntPtr.Zero;
perConnOptList.optionCount = 1;
perConnOptList.optionError = 0;
// figure out sizes & offsets
int icoSize = Marshal.SizeOf(ico);
int optionTotalSize = icoSize;
// alloc enough memory for the option
perConnOptList.options =
Marshal.AllocCoTaskMem(icoSize);
long icoOffset = (long)perConnOptList.options + (long)icoSize;
// Make pointer from the structure
IntPtr optionListPtr = perConnOptList.options;
Marshal.StructureToPtr(ico, optionListPtr, false);
//Make the query
if (InternetQueryOption(
IntPtr.Zero,
(int)InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION, //75
ref perConnOptList,
ref listSize) == true)
{
//retrieve the value
ico =
(InternetPerConnectionOption)Marshal.PtrToStructure(perConnOptList.options,
typeof(InternetPerConnectionOption));
}
// free the COM memory
Marshal.FreeCoTaskMem(perConnOptList.options);
//unpin the structs
gch.Free();
return(ico);
}
private static bool SwitchInternetProxy(PerConnectionFlags proxyFlagToSet, bool enableProxy)
{
InternetPerConnectionOption currentOption = GetInternetConnectionOption(PerConnectionOption.INTERNET_PER_CONNECTION_FLAGS);
if (enableProxy)
{
//To add this setting do a bitwise OR against the current value
//(compare the value bit by bit if either of the values has that bit set leave it set)
//this will essentially turn on this portion of the proxy flag.
currentOption.value.valueInt |= (int)proxyFlagToSet;
}
else
{
//To remove this setting do a bitwise XOR against the current value
//(compare the value bit by bit if one and only one of the two has that bit set leave it set)
//this will essentially turn off this portion of the proxy flags.
currentOption.value.valueInt ^= (int)proxyFlagToSet;
}
InternetPerConnectionOption[] options = new InternetPerConnectionOption[1];
options[0] = currentOption;
return(CallInternetSetOption(options));
}
private static bool SwitchInternetProxy(PerConnectionFlags proxyFlagToSet, bool enableProxy)
{
InternetPerConnectionOption currentOption = GetInternetConnectionOption(PerConnectionOption.INTERNET_PER_CONNECTION_FLAGS);
if (enableProxy)
{
//To add this setting do a bitwise OR against the current value
//(compare the value bit by bit if either of the values has that bit set leave it set)
//this will essentially turn on this portion of the proxy flag.
currentOption.value.valueInt |= (int)proxyFlagToSet;
}
else
{
//To remove this setting do a bitwise XOR against the current value
//(compare the value bit by bit if one and only one of the two has that bit set leave it set)
//this will essentially turn off this portion of the proxy flags.
currentOption.value.valueInt ^= (int)proxyFlagToSet;
}
InternetPerConnectionOption[] options = new InternetPerConnectionOption[1];
options[0] = currentOption;
return CallInternetSetOption(options);
}
private static InternetPerConnectionOption GetInternetConnectionOption(PerConnectionOption pco)
{
//Allocate the list and option.
InternetPerConnectionOptionList perConnOptList = new InternetPerConnectionOptionList();
InternetPerConnectionOption ico = new InternetPerConnectionOption();
//pin the option structure
GCHandle gch = GCHandle.Alloc(ico, GCHandleType.Pinned);
//initialize the option for the data we want
ico.option = pco;
//Initialize the option list for the default connection or LAN.
int listSize = Marshal.SizeOf(perConnOptList);
perConnOptList.size = listSize;
perConnOptList.connection = IntPtr.Zero;
perConnOptList.optionCount = 1;
perConnOptList.optionError = 0;
// figure out sizes & offsets
int icoSize = Marshal.SizeOf(ico);
int optionTotalSize = icoSize;
// alloc enough memory for the option
perConnOptList.options =
Marshal.AllocCoTaskMem(icoSize);
long icoOffset = (long)perConnOptList.options + (long)icoSize;
// Make pointer from the structure
IntPtr optionListPtr = perConnOptList.options;
Marshal.StructureToPtr(ico, optionListPtr, false);
//Make the query
if (InternetQueryOption(
IntPtr.Zero,
(int)InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION, //75
ref perConnOptList,
ref listSize) == true)
{
//retrieve the value
ico =
(InternetPerConnectionOption)Marshal.PtrToStructure(perConnOptList.options,
typeof(InternetPerConnectionOption));
}
// free the COM memory
Marshal.FreeCoTaskMem(perConnOptList.options);
//unpin the structs
gch.Free();
return ico;
}
private static bool CallInternetSetOption(InternetPerConnectionOption[] options)
{
InternetPerConnectionOptionList optionList = new InternetPerConnectionOptionList();
optionList.size = Marshal.SizeOf(optionList);
optionList.connection = IntPtr.Zero; //Default Connection
optionList.optionCount = options.Length;
optionList.optionError = 0;
optionList.options = VarPtr(options);
int optionListSize = Marshal.SizeOf(optionList);
IntPtr optionListPtr = Marshal.AllocCoTaskMem(optionListSize);
Marshal.StructureToPtr(optionList, optionListPtr, true);
bool iReturn;
iReturn = InternetSetOption(IntPtr.Zero, (int)InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION, optionListPtr, Marshal.SizeOf(optionList));
if (iReturn == false)
{
Win32Exception exception = new Win32Exception(Marshal.GetLastWin32Error());
throw exception;
}
else
{
iReturn = InternetOptionSettingsChanged();
//if (iReturn == true)
//{
// iReturn = InternetOptionRefresh();
//}
}
// free the COM memory
Marshal.FreeCoTaskMem(optionListPtr);
return iReturn;
}
public static bool SetInternetProxy(bool enableProxy, string proxyServerString, string proxyBypass,
bool autoDetectSettings, bool useAutoConfigureScript, string autoConfigureScript)
{
InternetPerConnectionOption[] options = new InternetPerConnectionOption[4];
options[0].option = PerConnectionOption.INTERNET_PER_CONNECTION_FLAGS;
if (autoDetectSettings)
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_AUTO_DETECT;
}
if (useAutoConfigureScript)
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_AUTO_PROXY_URL;
}
if (enableProxy)
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_PROXY;
}
else
{
options[0].value.valueInt |= (int)PerConnectionFlags.PROXY_TYPE_DIRECT;
}
options[1].option = PerConnectionOption.INTERNET_PER_CONNECTION_AUTOCONFIG_URL;
options[1].value.valueInt = Marshal.StringToHGlobalAuto(autoConfigureScript).ToInt32();
options[2].option = PerConnectionOption.INTERNET_PER_CONNECTION_PROXY_SERVER;
options[2].value.valueInt = Marshal.StringToHGlobalAuto(proxyServerString).ToInt32();
options[3].option = PerConnectionOption.INTERNET_PER_CONNECTION_PROXY_BYPASS;
options[3].value.valueInt = Marshal.StringToHGlobalAuto(proxyBypass).ToInt32(); // Marshal.StringToCoTaskMemAuto(proxyBypass);
return CallInternetSetOption(options);
}
public static bool SetAutoConfigURL(string autoConfigScriptURL)
{
InternetPerConnectionOption[] options = new InternetPerConnectionOption[1];
options[0] = new InternetPerConnectionOption();
options[0].option = PerConnectionOption.INTERNET_PER_CONNECTION_AUTOCONFIG_URL;
options[0].value.valueInt = Marshal.StringToHGlobalAuto(autoConfigScriptURL).ToInt32();
return CallInternetSetOption(options);
}
