Delphi实现读取系统时间与日期完整实例

unit Unit1;
interface
uses
 Windows,Messages,SysUtils,Classes,Graphics,Controls,Forms,Dialogs,StdCtrls;
type
 TForm1 = class(TForm)
  Button1: TButton;
  Memo1: TMemo;
  Button2: TButton;
  procedure Button1Click(Sender: TObject);
  procedure FormCreate(Sender: TObject);
  procedure Button2Click(Sender: TObject);
 private
  { Private declarations }
 public
  { Public declarations }
 end;
var
 Form1: TForm1;
implementation
{$R *.DFM}
uses ShellAPI;
function SetSystemDateTime(Year,Month,Day,Hour,Minute,Second: word): integer;  export;
 procedure SetDate(Year,Day: Word); assembler;
 asm
  MOV CX,Year
  MOV DH,BYTE PTR Month
  MOV DL,BYTE PTR Day
  MOV AH,2BH
  INT 21H
 end;
 procedure SetTime(Hour,Second,Sec100: Word); assembler;
 asm
  MOV CH,BYTE PTR Hour
  MOV CL,BYTE PTR Minute
  MOV DH,BYTE PTR Second
  MOV DL,BYTE PTR Sec100
  MOV AH,2DH
  INT 21H
 end;
begin
 SetDate(Year,Day);
 SetTime(Hour,Minute + 1,0);
 result := 1;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
    st : TSYSTEMTIME;
begin
    //得到系统时间
    GetSystemTime(st);
 //显示系统时间
    Memo1.Lines.Add('系统时间 = ' +
         IntToStr(st.wmonth) + '/' +
         IntToStr(st.wDay) + '/' +
         IntToStr(st.wYear) + ' ' +
         IntToStr(st.wHour) + ':' +
         IntToStr(st.wMinute) + ':' +
         IntToStr(st.wSecond));
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
    Memo1.Lines.Clear;
end;
procedure TForm1.Button2Click(Sender: TObject);
var
 st: TSYSTEMTIME;
begin
 DateTimeToSystemTime(StrToDatetime('2002-06-23 15:39:46' ),st);
 SetSystemTime(st);
end;
end.