Hi,

Your code seems passing the 3rd parameter incorrectly to
GetTokenInformation. Try following code instead:

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

namespace ConsoleApplication1
{
   class Program
   {
       enum TOKEN_ELEVATION_TYPE
       {
           TokenElevationTypeDefault = 1,
           TokenElevationTypeFull,
           TokenElevationTypeLimited
       }

       enum TOKEN_INFORMATION_CLASS
       {
           TokenUser = 1,
           TokenGroups,
           TokenPrivileges,
           TokenOwner,
           TokenPrimaryGroup,
           TokenDefaultDacl,
           TokenSource,
           TokenType,
           TokenImpersonationLevel,
           TokenStatistics,
           TokenRestrictedSids,
           TokenSessionId,
           TokenGroupsAndPrivileges,
           TokenSessionReference,
           TokenSandBoxInert,
           TokenAuditPolicy,
           TokenOrigin,
           TokenElevationType,
           TokenLinkedToken,
           TokenElevation,
           TokenHasRestrictions,
           TokenAccessInformation,
           TokenVirtualizationAllowed,
           TokenVirtualizationEnabled,
           TokenIntegrityLevel,
           TokenUIAccess,
           TokenMandatoryPolicy,
           TokenLogonSid,
           MaxTokenInfoClass  // MaxTokenInfoClass should always be the
last enum
       }
       const UInt32 TOKEN_QUERY = 0x0008;

       [DllImport("kernel32.dll")]
       static extern IntPtr GetCurrentProcess();

       [DllImport("advapi32.dll", SetLastError = true)]
       static extern bool OpenProcessToken(IntPtr ProcessHandle, UInt32
DesiredAccess, out IntPtr TokenHandle);

       [DllImport("advapi32.dll", SetLastError = true)]
       static extern bool GetTokenInformation(IntPtr TokenHandle,
TOKEN_INFORMATION_CLASS TokenInformationClass, IntPtr TokenInformation,
uint TokenInformationLength, out uint ReturnLength);

       static void Main(string[] args)
       {
           IntPtr hToken;
           TOKEN_ELEVATION_TYPE elevationType;
           IntPtr pElevationType =
Marshal.AllocHGlobal(sizeof(TOKEN_ELEVATION_TYPE));
           uint dwSize;

           OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, out hToken);
           GetTokenInformation(hToken,
TOKEN_INFORMATION_CLASS.TokenElevationType, pElevationType,
sizeof(TOKEN_ELEVATION_TYPE), out dwSize);
           elevationType =
(TOKEN_ELEVATION_TYPE)Marshal.ReadInt32(pElevationType);
           Marshal.FreeHGlobal(pElevationType);

           switch (elevationType)
           {
               case TOKEN_ELEVATION_TYPE.TokenElevationTypeDefault:
                   Console.WriteLine("\nTokenElevationTypeDefault - User
is not using a split token.\n");
                   break;
               case TOKEN_ELEVATION_TYPE.TokenElevationTypeFull:
                   Console.WriteLine("\nTokenElevationTypeFull - User has
a split token, and the process is running elevated.\n");
                   break;
               case TOKEN_ELEVATION_TYPE.TokenElevationTypeLimited:
                   Console.WriteLine("\nTokenElevationTypeLimited - User
has a split token, but the process is not running elevated.\n");
                   break;
           }
       }
   }
}

Let me know if this works on your side. Thanks.

Sincerely,
Walter Wang (wawang@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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