AdvApi32.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace DllInjectorCS
{
    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    public struct TokPriv1Luid
    {
        public int Count;
        public long Luid;
        public int Attr;
    }

    public static class AdvApi32
    {
        public const int TOKEN_QUERY = 0x00000008;
        public const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);

        [DllImport("advapi32.dll", SetLastError = true)]
        public static extern bool LookupPrivilegeValue(string host, string name, ref long pluid); 
    }
}