获取用户SID

 BOOL GetUserSID(CString &Sid)
 {
     HANDLE hProcess = GetCurrentProcess();

     if (hProcess)
     {
         HANDLE hToken;

         if (OpenProcessToken(hProcess, TOKEN_QUERY, &hToken) && hToken)
         {
             BYTE tagTokenInfoBuf[];
             PTOKEN_USER tagTokenInfo = (PTOKEN_USER)&tagTokenInfoBuf;

             if (GetTokenInformation(hToken, TokenUser, tagTokenInfoBuf, sizeof(tagTokenInfoBuf), NULL))
             {
                 LPTSTR MySid = NULL;

                 ConvertSidToStringSid(tagTokenInfo->User.Sid, &MySid);
                 Sid = MySid;

                 LocalFree(MySid);

                 return TRUE;
             }

             CloseHandle(hToken);
         }

         CloseHandle(hProcess);
     }

     return FALSE;
 }