Время старта и завершения работы системы

Code:

unit Unit1;

{©Drkb v.3}

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls;

type

TForm1 = class(TForm)

   Label1: TLabel;

   Label2: TLabel;

   procedure FormCreate(Sender: TObject);

private

   { Private declarations }

public

   { Public declarations }

end;

var

Form1: TForm1;

implementation

uses Registry;

{$R *.dfm}

type

SYSTEM_TIME_OF_DAY_INFORMATION = record

   BootTime: LARGE_INTEGER;

   CurrentTime: LARGE_INTEGER;

   TimeZoneBias: LARGE_INTEGER;

   CurrentTimeZoneId: ULONG;

end;

PSYSTEM_TIME_OF_DAY_INFORMATION = ^SYSTEM_TIME_OF_DAY_INFORMATION;

NTSTATUS = DWORD;

const

SystemTimeOfDayInformation =3;

function NtQuerySystemInformation(SystemInformationClass:byte;

           SystemInformation: Pointer;

           SystemInformationLength: ULONG;

           ReturnLength: PULONG): NTSTATUS; stdcall; external 'NTDLL.DLL';

function SysDateToStr(ST : TSystemTime) : string;

const

sDateFmt = 'dddd, d MMMM, yyyy';

begin

SetLength(Result, 255);

GetDateFormat(LOCALE_USER_DEFAULT, 0, @ST, sDateFmt, @result[1], 255);

SetLength(Result, LStrLen(@result[1]));

end;

function SysTimeToStr(ST : TSystemTime):string;

const

sTimeFmt = 'HH:mm:ss' ;

begin

SetLength(result,15);

GetTimeFormat(LOCALE_USER_DEFAULT,0,@st,sTimeFmt,@result[1],15);

SetLength(result, StrLen(@result[1]));

end;

function GetFileTimeToSystemTime(ft:TFileTime):string;

var

st,lt:TSystemTime;

tz:TTimezoneInformation;

begin

Result:='';

if not FileTimeToSystemTime(ft, st) then exit;

GetTimeZoneInformation(tz);

SystemTimeToTzSpecificLocalTime(@tz,st,lt);

Result:=SysDateToStr(lt)+'  at  ' + SysTimeToStr(lt);

end;

// дата/время последнего выключения (или перезагрузки) системы

function GetLastSystemShutdown:string;

var

ft:TFileTime;

reg:TRegistry;

begin

Result:='';

reg:=TRegistry.Create;

try

reg.RootKey:=HKEY_LOCAL_MACHINE;

if (not reg.OpenKeyReadOnly('System\CurrentControlSet\Control\Windows')) then exit;

if (reg.ReadBinaryData('ShutdownTime',ft,sizeof(ft))=0) then exit

finally

reg.Free

end;

Result:= GetFileTimeToSystemTime(ft)

end;

// дата/время старта системы

function NtGetBootDateTime:string;

var

sti : SYSTEM_TIME_OF_DAY_INFORMATION;

status : NTSTATUS;

ftSystemBoot: FILETIME;

ST:TSystemTime;

begin

Result:='';

status:=NtQuerySystemInformation(SystemTimeOfDayInformation, @sti,

                    sizeof(SYSTEM_TIME_OF_DAY_INFORMATION),nil);

if (status<>NO_ERROR) then exit;

ftSystemBoot := PFILETIME(@(sti.BootTime))^;

if FileTimeToLocalFileTime(ftSystemBoot,ftSystemBoot) then

if FileTimeToSystemTime(ftSystemBoot,ST) then

Result:=SysDateToStr(ST)+'  at  '+SysTimeToStr(ST)

end;

procedure TForm1.FormCreate(Sender: TObject);

begin

Label1.Caption:='System start: '+NtGetBootDateTime;

label2.Caption:='Last system shutdown: '+GetLastSystemShutdown;

end;

end.