Export (0) Print
Expand All

How to Shut Down the System

The following example uses the ExitWindowsEx function to shut down the system. Shutting down flushes file buffers to disk and brings the system to a condition in which it is safe to turn off the computer. The application must first enable the SE_SHUTDOWN_NAME privilege. For more information, see Privileges.


#include <windows.h>

#pragma comment(lib, "user32.lib")
#pragma comment(lib, "advapi32.lib")

BOOL MySystemShutdown()
{
   HANDLE hToken; 
   TOKEN_PRIVILEGES tkp; 
 
   // Get a token for this process. 
 
   if (!OpenProcessToken(GetCurrentProcess(), 
        TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) 
      return( FALSE ); 
 
   // 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) 
      return FALSE; 
 
   // 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)) 
      return FALSE; 

   //shutdown was successful
   return TRUE;
}


The final parameter in the call to ExitWindowsEx indicates that the system was shut down for a planning update of the operating system. For more information, see System Shutdown Reason Codes.

Related topics

Shutting Down

 

 

Community Additions

ADD
Show:
© 2014 Microsoft