kann man alle wichtigen Funktionen auslagern ?

[LingNeu]

@mkinzler
Es kommt immer "undefinierter Bezeichner: Dauer"

Delphi-Quellcode:

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Label1: TLabel;
    Button1: TButton;
    Label2: TLabel;
    Label3: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;
var
  Form1: TForm1;
implementation
uses unit2;
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
//rest
label3.Caption := Dauer(now);
end;

Delphi-Quellcode:

unit Unit2;

interface
function Dauer(ADate: TDateTime): string;

implementation

function Dauer(ADate: TDateTime): string;
//rest
end;