unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    CategoryPanelGroup1: TCategoryPanelGroup;
    CategoryPanel1: TCategoryPanel;
    CategoryPanel2: TCategoryPanel;
    CategoryPanel3: TCategoryPanel;
    PageScroller1: TPageScroller;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  CategoryPanel1.Height := ClientHeight div 2;
  CategoryPanel2.Height := CategoryPanel1.Height;
  CategoryPanel3.Height := CategoryPanel1.Height;

  CategoryPanel1.Caption := 'CPanel1';
  CategoryPanel2.Caption := 'CPanel2';
  CategoryPanel3.Caption := 'CPanel3';

  CategoryPanelGroup1.GradientBaseColor := clYellow;
  CategoryPanelGroup1.GradientColor := clRed;
  CategoryPanel1.Color := clWhite;

  Button1.Caption := 'CategoryPanelGroup1.HeaderHeight +';
  Button2.Caption := 'CategoryPanelGroup1.HeaderHeight -';
  Button3.Caption := 'CategoryPanel1.Height +';
  Button4.Caption := 'CategoryPanel1.Height -';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  CategoryPanelGroup1.HeaderHeight := CategoryPanelGroup1.HeaderHeight + 2;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  CategoryPanelGroup1.HeaderHeight := CategoryPanelGroup1.HeaderHeight - 2;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  CategoryPanel1.Height := CategoryPanel1.Height + 10;
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  CategoryPanel1.Height := CategoryPanel1.Height - 10;
end;

end.

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 187
  ClientWidth = 405
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object CategoryPanelGroup1: TCategoryPanelGroup
    Left = 0
    Top = 0
    Width = 177
    Height = 187
    VertScrollBar.Tracking = True
    HeaderFont.Charset = DEFAULT_CHARSET
    HeaderFont.Color = clWindowText
    HeaderFont.Height = -11
    HeaderFont.Name = 'Tahoma'
    HeaderFont.Style = []
    TabOrder = 0
    ExplicitHeight = 207
    object CategoryPanel1: TCategoryPanel
      Top = 0
      Caption = 'CategoryPanel1'
      TabOrder = 0
    end
    object CategoryPanel2: TCategoryPanel
      Top = 200
      Caption = 'CategoryPanel2'
      TabOrder = 1
    end
    object CategoryPanel3: TCategoryPanel
      Top = 400
      Caption = 'CategoryPanel3'
      TabOrder = 2
      object PageScroller1: TPageScroller
        Left = 8
        Top = 80
        Width = 150
        Height = 45
        TabOrder = 0
      end
    end
  end
  object Button1: TButton
    Left = 192
    Top = 24
    Width = 200
    Height = 25
    Caption = 'Button1'
    TabOrder = 1
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 192
    Top = 58
    Width = 200
    Height = 25
    Caption = 'Button2'
    TabOrder = 2
    OnClick = Button2Click
  end
  object Button3: TButton
    Left = 192
    Top = 109
    Width = 200
    Height = 25
    Caption = 'Button3'
    TabOrder = 3
    OnClick = Button3Click
  end
  object Button4: TButton
    Left = 192
    Top = 144
    Width = 200
    Height = 25
    Caption = 'Button4'
    TabOrder = 4
    OnClick = Button4Click
  end
end