unit1.~pas

这有很多Delphi应用的例子

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label7: TLabel;
    Edit1: TEdit;
    Label8: TLabel;
    Label9: TLabel;
    Label10: TLabel;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Button1: TButton;
    Label5: TLabel;
    Label14: TLabel;
    Label6: TLabel;
    Label11: TLabel;
    Edit5: TEdit;
    Edit6: TEdit;
    Edit7: TEdit;
    Label12: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  Edit1.Text:=Concat(Label2.Caption,Label4.Caption,Label14.Caption);
  Edit2.Text:=Copy(Edit1.Text,StrtoInt(Edit5.Text),StrtoInt(Edit6.Text));
  Edit3.Text:=InttoStr(Length(Edit1.Text));
  Edit4.Text:=InttoStr(Pos(Edit7.Text,Edit1.Text));
end;


end.