Win32 API FAQ
Страница 11.

SetPrivilegeOnAccount(
                       PolicyHandle, // policy handle
                       pSid, // SID to grant privilege
                       L"SeInteractiveLogonRight", // Unicode privilege
                       TRUE // enable the privilege
                       );

SetPrivilegeOnAccount(
                       PolicyHandle,
                       pSid,
                       L"SeNetworkLogonRight",
                       TRUE
                       );

LsaClose(PolicyHandle);

return 0;
}

20)--------------------------------------------------------------------------

    Q> Как узнать какие пользователи есть на моей (или не моей) машине

    A>

#define STRICT
#include
#include
#include
#include

void UserEnum()
{
       BOOL keepGoing = TRUE ;
       DWORD entriesRead, totalEntries ;
       USER_INFO_2 * pInfo = NULL ;
       DWORD resumeHandle = 0 ; // must be 0 to start with
       char nameBuf[ UNLEN + 1 ] ; // constants defined in LMCONS.H
       char commentBuf[ MAXCOMMENTSZ + 1 ] ;
       WCHAR serverName[ 100 ] ;
       lstrcpyW( serverName, L"\\\\PDC" ) ; //L"" ) ;
       while ( keepGoing )
       {
           NET_API_STATUS ret = NetUserEnum(
               serverName, //NULL,
               2,
      0, //FILTER_NORMAL_ACCOUNT,
               (LPBYTE *)&pInfo, // Important: ADDRESS of POINTER
               sizeof( USER_INFO_2 ) * 100, // requested buffer size;
               &entriesRead,
               &totalEntries,
               &resumeHandle ) ;

           keepGoing = ( ret == ERROR_MORE_DATA ) ;

           if ( ret == 0 || ret == ERROR_MORE_DATA )
           {
               DWORD i ;
               for ( i = 0 ; i < entriesRead ; i++ )
               {
                   // Note that strings in the INFO structures
                   // will ALWAYS be Unicode, regardless of
                   // your settings! Even though they're declared
                   // as LPTSTR, they're always LPWSTR.
                   // I'm compiling for non-Unicode, so I
                   // convert them to ANSI strings...
                   // Check for NULL pointers in the INFO structure
                   LPWSTR pName = (LPWSTR)pInfo[ i ].usri2_name ;
                   LPWSTR pComm = (LPWSTR)pInfo[ i ].usri2_comment ;
                   if ( pName == NULL )
                   {
                       lstrcpy( nameBuf, "(no name!)" ) ;
                   }
                   else if ( lstrlenW( pName ) == 0 )
                   {
                       lstrcpy( nameBuf, "(empty name!)" ) ;
                   }
                   else
                   {
                       WideCharToMultiByte( CP_ACP, 0,
                           pName, -1,
                           nameBuf, UNLEN,
                           NULL, NULL ) ;
                   }
                   if ( pComm == NULL )
                   {
                       lstrcpy( commentBuf, "(no comment!)" ) ;
                   }
                   else if ( lstrlenW( pComm ) == 0 )
                   {
                       lstrcpy( commentBuf, "(empty comment!)" ) ;
                   }
                   else
                   {
                       WideCharToMultiByte( CP_ACP, 0,
                           pComm, -1,
                           commentBuf, MAXCOMMENTSZ,
                           NULL, NULL ) ;
                   }
                   cout << nameBuf << ": " << commentBuf << endl ;
               }
           }
           else
           {
               cout << "NetUserEnum error " << ret << endl ;
           }

           if ( pInfo )
           {
               NetApiBufferFree( pInfo ) ;
               pInfo = NULL ;
           }
       }
}