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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.
Events
Apr 8, 3 PM - May 28, 7 AM
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