unit1.pas

then control for change set of pb

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    
  end;

var
  Form1: TForm1;

implementation

uses Unit2, Unit3, ubase;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  fm: TForm2;
begin
   fm:=tform2.Create(self);
   fm.Show;
end;



procedure TForm1.FormCreate(Sender: TObject);
begin
   fmbase:=tfmbase.create(self);
   fmbase.parent:=self;
   fmbase.show;
   fmbase.Align:=alclient;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  fm: TForm3;
begin
   fm:=tform3.Create(self);
   fm.Show;
end;

end.