怎么在windows中得到当前用户ID，得以判断他是管理员,windows中的API是什么啊？

Question

如上

Answer 1

nStatus = NetUserEnum(NULL,dwLevel,FILTER_NORMAL_ACCOUNT,(LPBYTE*)&pBuf,
                             dwPrefMaxLen,&dwEntriesRead,&dwTotalEntries,&dwResumeHandle);
       if ((nStatus == NERR_Success) || (nStatus == ERROR_MORE_DATA))
       {
          if ((pTmpBuf = pBuf) != NULL)
          {
              for (i = 0; (i < dwEntriesRead); i++)
  {
                if (pTmpBuf == NULL)
                {
                   printf("An access violation has occurred\n");
                   break;
                }
                wprintf(L"Name:\t\t %s\n", pTmpBuf->usri3_name);  
switch(pTmpBuf->usri3_priv)
{
case USER_PRIV_GUEST:
printf("%-10s\t","Guest");
break;
case USER_PRIV_USER:
printf("%-10s\t","User");
break;
case USER_PRIV_ADMIN://管理员
printf("%-10s\t","Administrator");
break;
default:
printf("%-10s\t","");
break;
}
                pTmpBuf++;
                dwTotalCount++;
  }
          }
再用GetUserName（）取当前用户名，判断一下

Answer 2

Figure 3   Member of Administrator? 
 bool bIsAdmin = false;
 SID_IDENTIFIER_AUTHORITY ntauth = 
     SECURITY_NT_AUTHORITY;
 void* psidAdmin = 0;
 AllocateAndInitializeSid( &ntauth, 2,
     SECURITY_BUILTIN_DOMAIN_RID,
     DOMAIN_ALIAS_RID_ADMINS,
     0, 0, 0, 0, 0, 0, &psidAdmin );
 HANDLE htok = 0;
 OpenProcessToken( GetCurrentProcess(),
                   TOKEN_QUERY, &htok );
 DWORD cb = 0;
 GetTokenInformation( htok, TokenGroups,
                      0, 0, &cb );
 TOKEN_GROUPS* ptg = (TOKEN_GROUPS*) malloc(cb);
 GetTokenInformation( htok, TokenGroups,
                      ptg, cb, &cb );
 for ( DWORD i = 0; i < ptg->GroupCount; ++i )
   if ( EqualSid( psidAdmin, ptg->Groups[i].Sid ) )
     break;
 bIsAdmin = i != ptg->GroupCount;
 free( ptg );
 CloseHandle( htok );
 FreeSid( psidAdmin );