枚举NT系统用户

#define UNICODE
#include <windows.h>
#include <stdio.h>
#include <lm.h>

void main( int argc, char *argv[ ] )
{
   PNET_DISPLAY_USER pBuff, p;
   DWORD res, dwRec, i = 0;
   //
   // You can pass a NULL or empty string
   //  to retrieve the local information.
   //
   TCHAR szServer[255]=TEXT("");

   if(argc > 1)
      //
      // Check to see if a server name was passed;
      //  if so, convert it to Unicode.
      //
      MultiByteToWideChar(CP_ACP, 0, argv[1], -1, szServer, 255);

   do // begin do
   {
      //
      // Call the NetQueryDisplayInformation function;
      //   specify information level 1 (user account information).
      //
      res = NetQueryDisplayInformation(szServer, 1, i, 1000, MAX_PREFERRED_LENGTH, &dwRec, (void**)&pBuff);
      //
      // If the call succeeds,
      //
      if((res==ERROR_SUCCESS) || (res==ERROR_MORE_DATA))
      {
         p = pBuff;
         for(;dwRec>0;dwRec--)
         {
            //
            // Print the retrieved group information.
            //
            printf("Name:      %S\n"
                  "Comment:   %S\n"
                  "Group ID:  %u\n"
                  "Attributes: %u\n"
                  "--------------------------------\n",
                  p->usri1_name,
                  p->usri1_comment,
                  p->usri1_user_id,
                  p->usri1_flags);
            //
            // If there is more data, set the index.
            //
            i = p->usri1_next_index;
            p++;
         }
         //
         // Free the allocated memory.
         //
         NetApiBufferFree(pBuff);
      }
      else
         printf("Error: %u\n", res);
   //
   // Continue while there is more data.
   //
   } while (res==ERROR_MORE_DATA); // end do
   return;
}