public InternetConnectionOption GetIEProxy(PerConnOption perConnOption)
{
InternetPerConnOptionList InternetPerConnList = new InternetPerConnOptionList();
int listSize = Marshal.SizeOf(InternetPerConnList);
InternetPerConnList.dwSize = Marshal.SizeOf(InternetPerConnList);
InternetPerConnList.dwOptionCount = 1;
InternetPerConnList.dwOptionError = 0;
InternetPerConnList.szConnection = IntPtr.Zero;
InternetConnectionOption ico = new InternetConnectionOption();
GCHandle gch = GCHandle.Alloc(ico, GCHandleType.Pinned);
ico.m_Option = perConnOption;
int icoSize = Marshal.SizeOf(ico);
InternetPerConnList.options = Marshal.AllocCoTaskMem(icoSize);
IntPtr optionListPtr = InternetPerConnList.options;
Marshal.StructureToPtr(ico, optionListPtr, false);
if (NativeMethods.InternetQueryOption(IntPtr.Zero, 75, ref InternetPerConnList, ref listSize) == true)
{
ico = (InternetConnectionOption)Marshal.PtrToStructure(InternetPerConnList.options, typeof(InternetConnectionOption));
}
Marshal.FreeCoTaskMem(InternetPerConnList.options);
gch.Free();
return(ico);
}
public void SetIEProxy(string proxyStr, string exceptions)
{
int optionCount = 1;
InternetConnectionOption[] options = new InternetConnectionOption[3];
options[0].m_Option = PerConnOption.INTERNET_PER_CONN_FLAGS;
if (string.IsNullOrEmpty(proxyStr))
{
options[0].m_Value.m_Int = (int)PerConnFlags.PROXY_TYPE_DIRECT;
}
else
{
options[0].m_Value.m_Int = (int)(PerConnFlags.PROXY_TYPE_DIRECT | PerConnFlags.PROXY_TYPE_PROXY);
}
if (!string.IsNullOrEmpty(proxyStr))
{
options[1].m_Option = PerConnOption.INTERNET_PER_CONN_PROXY_SERVER;
options[1].m_Value.m_StringPtr = Marshal.StringToHGlobalAuto(proxyStr);
optionCount = 2;
if (!string.IsNullOrEmpty(exceptions))
{
options[2].m_Option = PerConnOption.INTERNET_PER_CONN_PROXY_BYPASS;
if (exceptions == "null")
{
options[2].m_Value.m_StringPtr = Marshal.StringToHGlobalAuto(null);
}
else
{
options[2].m_Value.m_StringPtr = Marshal.StringToHGlobalAuto(exceptions);
}
optionCount = 3;
}
}
InternetPerConnOptionList InternetPerConnList = new InternetPerConnOptionList();
InternetPerConnList.dwSize = Marshal.SizeOf(InternetPerConnList);
InternetPerConnList.dwOptionError = 0;
InternetPerConnList.szConnection = IntPtr.Zero;
int optSize = Marshal.SizeOf(typeof(InternetConnectionOption));
IntPtr optionsPtr = Marshal.AllocCoTaskMem(optSize * optionCount);
for (int i = 0; i < optionCount; ++i)
{
if (options[i].m_Option > 0)
{
IntPtr opt = new IntPtr(optionsPtr.ToInt32() + (i * optSize));
Marshal.StructureToPtr(options[i], opt, false);
}
}
InternetPerConnList.dwOptionCount = optionCount;
InternetPerConnList.options = optionsPtr;
IntPtr ipcoListPtr = Marshal.AllocCoTaskMem((Int32)InternetPerConnList.dwSize);
Marshal.StructureToPtr(InternetPerConnList, ipcoListPtr, false);
NativeMethods.InternetSetOption(IntPtr.Zero,
InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION,
ipcoListPtr,
InternetPerConnList.dwSize);
Marshal.FreeCoTaskMem(optionsPtr);
Marshal.FreeCoTaskMem(ipcoListPtr);
}
public static extern bool InternetQueryOption(IntPtr hInternet, int dwOption, ref InternetPerConnOptionList optionsList, ref int bufferLength);