using System;
using System.Runtime.InteropServices;
using System.Reflection;

namespace Microsoft.VirtualServer.Interop
{
    using System;
    using System.Runtime.InteropServices;
    using System.Reflection;

    public class 
    Powershell
    {
        const uint EOAC_NONE                   = 0;
        const uint RPC_C_AUTHN_WINNT           = 10;
        const uint RPC_C_AUTHZ_NONE            = 0;
        const uint RPC_C_AUTHN_LEVEL_DEFAULT   = 0;
        const uint RPC_C_IMP_LEVEL_IMPERSONATE = 3;

        [DllImport(
            "Ole32.dll", 
            CharSet = CharSet.Auto
            )
        ]
        public static extern int 
        CoSetProxyBlanket(
            IntPtr pProxy, 
            uint   dwAuthnSvc, 
            uint   dwAuthzSvc,
            uint   pServerPrincName, 
            uint   dwAuthLevel,
            uint   dwImpLevel, 
            IntPtr pAuthInfo,
            uint   dwCapabilities
        );

        public static int 
        SetSecurity(
            object objDCOM
            )
        {
            IntPtr dispatchInterface = Marshal.GetIDispatchForObject(objDCOM);
            int hr = CoSetProxyBlanket(
                dispatchInterface,           //pProxy
                RPC_C_AUTHN_WINNT,           //dwAuthnSvc
                RPC_C_AUTHZ_NONE,            //dwAuthzSvc
                0,                           //pServerPrincName
                RPC_C_AUTHN_LEVEL_DEFAULT,   //dwAuthnLevel
                RPC_C_IMP_LEVEL_IMPERSONATE, //dwImpLevel
                IntPtr.Zero,                 //pAuthInfo
                EOAC_NONE                    //dwCapabilities
            );
            return hr;
        }
    }
}