[Code Snip] shut down my computer

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It is very interesting to write your own application to Shut Down, Restart or Log Off the system. right? Its not a big task. Very simple to make it.

Simply use the Win32 API ExitWindowsEx to do this. It sends the WM_QUERYENDSESSION to all applications to determine if they can be terminated.
BOOL ExitWindowsEx(UINT uFlags, DWORD dwReason)
uFlags tells what to do. Different values possible are.
1) EWX_LOGOFF
2) EWX_POWEROFF
3) EWX_REBOOT
4) EWX_RESTARTAPPS
5) EWX_SHUTDOWN
dwReason � indicates the reason for initiating the shutdown.

void ToShutdownMySystem()
{
   HANDLE hToken;
   TOKEN_PRIVILEGES tkp;
 
   // Get a token for this process.  
   if (!OpenProcessToken(GetCurrentProcess(),
      TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
      AfxMessageBox("Failed to get the token for this process");
 
   // 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("Failed to adjust the token privileges.");
 
   // Shut down the system and force all applications to close.  
   if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE,
      SHTDN_REASON_MAJOR_OPERATINGSYSTEM |
      SHTDN_REASON_MINOR_UPGRADE |
      SHTDN_REASON_FLAG_PLANNED))
      AfxMessageBox("Failed to Shut Down the system.");
}

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이미지
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