C++远程关机API的学习经历

           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_SHUTDOWN|EWX_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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