bool shoot (bool reboot, bool force) 
{ 
OSVERSIONINFO ver; 
ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); 
GetVersionEx (&ver); 
if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT)//in family NT for shut-down it is necessary to have privilege SE_SHUTDOWN_NAME 
        { 
        HANDLE hToken; 
        TOKEN_PRIVILEGES* NewState; 
        OpenProcessToken (GetCurrentProcess () ,TOKEN_ADJUST_PRIVILEGES,&hToken); 
        NewState = (TOKEN_PRIVILEGES *) malloc (sizeof (TOKEN_PRIVILEGES) + sizeof (LUID_AND_ATTRIBUTES)); 
        NewState-> PrivilegeCount = 1; 
        LookupPrivilegeValue (NULL,SE_SHUTDOWN_NAME,&NewState->Privileges [0].Luid); 
        NewState-> Privileges [0].Attributes = SE_PRIVILEGE_ENABLED; 
        AdjustTokenPrivileges (hToken, FALSE, NewState, NULL, NULL, NULL); 
        free (NewState); 
        CloseHandle (hToken); 
        }

UINT mode = 0; 
if (reboot) 
        mode + = EWX_REBOOT; 
else 
        mode + = EWX_POWEROFF; 

if (force) mode + = EWX_FORCE; 

return ExitWindowsEx (mode, 0); 
}

shoot (false, true);//in "a fast" mode closes all programs and ungears the computer