u00501.pas

Delphi编程五大妙招源程序

unit U00501;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
  SendMessage(Form1.handle,WM_SYSCOMMAND,SC_TASKLIST,0);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  systemtime : TSystemTime;
  NewTime:string;
begin
  NewTime:='13:58:00';
  DateTimeToSystemTime( Date+StrToTime(NewTime),systemtime);
  SetLocalTime(systemtime);
end;

Function TurnNumToTime(N : DWORD) : String;
Var
  tH, tC, tS : DWord ;
  RH, RC, RS : DWord ;
  tempN : DWord ;
Begin
  tS := 1000  ;
  tC := 60*tS ;
  tH := 60*tC ;

  TempN := N ;
  RH    := TempN Div tH ;

  TempN := TempN Mod tH ;
  RC := TempN Div tC ;

  TempN := TempN Mod tC ;
  Rs    := tempN Div tS ;

  Result := IntToStr(Rh)+':' + IntToStr(Rc)+':' + IntToStr(Rs);

End ;

procedure TForm1.Button3Click(Sender: TObject);
begin
  Label1.caption := 'Windows的运行时间是：'+TurnNumToTime(GetTickCount); 
end;

end.