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C++远程关机API的学习过程

    记得刚学C++的时候,喜欢研究API,当时同事有一个高手,写了段代码,我在写程序的时候,莫明妙的,机器突然关掉了!我正在纳闷的时候,我听到了他的奸笑!

   原来是他干的,后来我研究了好久InitiateSystemShutdown这个API函数,了解被作弄的原理了,因为我的机器加入了Windows的域,而且域的超级用户我也设置成对我本机有Administrator权限,所以,他才有机可乘!后来写了以下这段代码,让他也在工作的时候被我远程关机,爽啊!学了新东西,又以其人之道还施彼身!

 //ShutDownSystem函数是关本地,自己的机器
   BOOL CAlarmClockDlg::ShutDownSystem()
   {
   HANDLE hToken;
   TOKEN_PRIVILEGES tkp;
   // Get a token for this process.
   if (!OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES TOKEN_QUERY, &hToken))
   AfxMessageBox("OpenProcessToken");
   // Get the LUID for the shutdown privilege.
   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
   tkp.PrivilegeCount = 1; // one privilege to set
   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
   // Get the shutdown privilege for this process.
   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
   if(GetLastError()!= ERROR_SUCCESS)
   AfxMessageBox("AdjustTokenPrivileges");
   // Shut down the system and force all applications to close.
   if(!ExitWindowsEx(EWX_SHUTDOWNEWX_FORCE, 0))
   {
   return FALSE;
   }
   else
   {
   return TRUE;
   }
   }
   //shutdownHost这个就是远程关机的C++函数了!hostName可以是机器IP,也可以是机器名字!
   BOOL CAlarmClockDlg::shutdownHost(CString hostName)
   {
   HANDLE hToken; // handle to process token
   TOKEN_PRIVILEGES tkp; // pointer to token structure
   BOOL fResult; // system shutdown flag
   // Get the current process token handle so we can get shutdown
   // privilege.
   if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES TOKEN_QUERY, &hToken))
   AfxMessageBox("OpenProcessToken failed.");
   // Get the LUID for shutdown privilege.
   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &tkp.Privileges[0].Luid);
   tkp.PrivilegeCount = 1; // one privilege to set
   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
   // Get shutdown privilege for this process.
   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES) NULL, 0);
   // Cannot test the return value of AdjustTokenPrivileges.
   if (GetLastError() != ERROR_SUCCESS)
   AfxMessageBox("AdjustTokenPrivileges enable failed.");
   // Display the shutdown dialog box and start the time-out countdown.
   fResult = InitiateSystemShutdown("192.168.100.245", // shut down local computer
   "Click on the main window and press the Escape key to cancel shutdown.", // message to user
   1, // time-out period
   FALSE, // ask user to close apps //注意这一段API调用!
   FALSE); // reboot after shutdown
   if (!fResult)
   {
   AfxMessageBox("InitiateSystemShutdown failed.");
   }
   // Disable shutdown privilege.
   tkp.Privileges[0].Attributes = 0;
   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES) NULL, 0);
   if (GetLastError() != ERROR_SUCCESS)
   {
   AfxMessageBox("AdjustTokenPrivileges disable failed.");
   }
   return TRUE;
   }

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