IsLeapYear、IsInLeapYear - 是否是閏年

SysUtils.IsLeapYear();
DateUtils.IsInLeapYear();

unit　Unit1;

interface

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

type
　TForm1　=　class(TForm)
　　procedure　FormCreate(Sender:　TObject);
　end;

var
　Form1:　TForm1;

implementation

{$R　*.dfm}

uses　DateUtils;

procedure　TForm1.FormCreate(Sender:　TObject);
var
　b:　Boolean;
begin
　b　:=　IsLeapYear(2009);　//False
　b　:=　IsLeapYear(2012);　//True

　b　:=　IsInLeapYear(StrToDateTime('2009-1-1'));　//False
　b　:=　IsInLeapYear(StrToDateTime('2012-1-1'));　//True

//　ShowMessage(BoolToStr(b,　True));
end;

end.