/examples/helloform.pp

 1{
 2 ***************************************************************************
 3 *                                                                         *
 4 *   This source is free software; you can redistribute it and/or modify   *
 5 *   it under the terms of the GNU General Public License as published by  *
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12 *   General Public License for more details.                              *
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20}
21unit HelloForm;
22
23{$mode objfpc}
24{$H+}
25
26interface
27
28uses SysUtils, Classes, Forms, Buttons, StdCtrls;
29
30type
31   THello = class(TForm)
32     button1 : TButton;
33   public
34     constructor Create(AOwner: TComponent); override;
35     procedure button1Click(Sender : TObject);
36   end;
37
38var
39   Hello : THello;
40
41implementation
42
43constructor THello.Create(AOwner: TComponent);
44begin
45   inherited CreateNew(AOwner, 1);
46   Caption := 'Hello World';
47   Width := 200;
48   Height := 75;
49   Left := 200;
50   Top := 200;
51
52   button1 := TButton.Create(Self);
53   button1.OnClick := @button1click;
54   button1.Parent := Self;
55   button1.left := (width - 75) div 2 ;
56   button1.top := (height - 32) div 2;
57   button1.width := 75;
58   button1.height := 32;
59   button1.caption := 'Close';
60   button1.Show;
61   
62   Self.Constraints.MaxWidth:= 500; 
63end;
64
65procedure THello.button1Click(Sender : TObject);
66begin
67  close;
68end;
69
70end.
71