Instantiating IInternetSecurityManager interface in PowerShell

gistfile1.txt

# Define CoCreateInstance function and IInternetSecurityManager interface
Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;

public class NativeMethods
{

  private const string CLSID_InternetSecurityManager = "7b8a2d94-0ac9-11d1-896c-00c04fb6bfc4";
  public const uint ZoneLocalMachine = 0;
  public const uint ZoneIntranet = 1;
  public const uint ZoneTrusted = 2;
  public const uint ZoneInternet = 3;
  public const uint ZoneUntrusted = 4;

  public static uint MapUrlToZone(string url)
  {
      IInternetSecurityManager manager = CreateInternetSecurityManager();
      uint Zone;
      manager.MapUrlToZone(url, out Zone, 0);
      return Zone;
  }

  public static IInternetSecurityManager CreateInternetSecurityManager()
  {
      Type iismType = Type.GetTypeFromCLSID(new Guid(CLSID_InternetSecurityManager));
      return (IInternetSecurityManager)Activator.CreateInstance(iismType);
  }


  [DllImport("ole32.Dll")]
  public static extern UInt32 CoCreateInstance(ref Guid clsid,[MarshalAs(UnmanagedType.IUnknown)] object inner,uint context,ref Guid uuid,[MarshalAs(UnmanagedType.IUnknown)] out object rReturnedComObject);

  [DllImport("ole32.dll", CharSet=CharSet.Unicode)]
  public static extern int CLSIDFromProgID(string lpszProgID,out Guid pclsid);

  //COPIED FROM https://www.pinvoke.net/default.aspx/Interfaces/IInternetSecurityManager.html
  [ComImport, GuidAttribute("79eac9ee-baf9-11ce-8c82-00aa004ba90b")]
  [InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
  public interface IInternetSecurityManager
  {
      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int SetSecuritySite([In] IntPtr pSite);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int GetSecuritySite([Out] IntPtr pSite);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int MapUrlToZone([In, MarshalAs(UnmanagedType.LPWStr)] string pwszUrl,
                  out UInt32 pdwZone, UInt32 dwFlags);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int GetSecurityId([MarshalAs(UnmanagedType.LPWStr)] string pwszUrl,
                  [MarshalAs(UnmanagedType.LPArray)] byte[] pbSecurityId,
                  ref UInt32 pcbSecurityId, uint dwReserved);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int ProcessUrlAction([In, MarshalAs(UnmanagedType.LPWStr)] string pwszUrl,
                  UInt32 dwAction, out byte pPolicy, UInt32 cbPolicy,
                  byte pContext, UInt32 cbContext, UInt32 dwFlags,
                  UInt32 dwReserved);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int QueryCustomPolicy([In, MarshalAs(UnmanagedType.LPWStr)] string pwszUrl,
                  ref Guid guidKey, ref byte ppPolicy, ref UInt32 pcbPolicy,
                  ref byte pContext, UInt32 cbContext, UInt32 dwReserved);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int SetZoneMapping(UInt32 dwZone,
                  [In, MarshalAs(UnmanagedType.LPWStr)] string lpszPattern,
                  UInt32 dwFlags);

      [return: MarshalAs(UnmanagedType.I4)]
      [PreserveSig]
      int GetZoneMappings(UInt32 dwZone, out IEnumString ppenumString,
              UInt32 dwFlags);
  }

} // end class NativeMethods;
"@ -Language CSharp

[NativeMethods]::MapUrlToZone('http://www.microsoft.com')