给你一段例子,窗体上放一个TDateTimePicker,Timer,Button,Edit控件. var iAllSeconds:integer;procedure TForm1.Button1Click(Sender: TObject); var dtTemp:TDateTime; begin dtTemp:=DateTimePicker1.DateTime-now; iAllSeconds:=Round(dtTemp*24*60*60); Timer1.Enabled:=true; end;procedure TForm1.Timer1Timer(Sender: TObject); begin Edit1.Text:=IntToStr(iAllSeconds); inc(iAllSeconds,-1); end;
var
iAllSeconds:integer;procedure TForm1.Button1Click(Sender: TObject);
var
dtTemp:TDateTime;
begin
dtTemp:=DateTimePicker1.DateTime-now;
iAllSeconds:=Round(dtTemp*24*60*60);
Timer1.Enabled:=true;
end;procedure TForm1.Timer1Timer(Sender: TObject);
begin
Edit1.Text:=IntToStr(iAllSeconds);
inc(iAllSeconds,-1);
end;