Inno Setup custom component description

[Setup]
AppName=My Program
AppVerName=My Program version 1.5
DefaultDirName={pf}\My Program

[Files]
Source: Leeme1.rtf; Flags: dontcopy
Source: Leeme2.rtf; Flags: dontcopy
Source: Leeme3.rtf; Flags: dontcopy
Source: Button1.bmp; Flags: dontcopy
Source: Button2.bmp; Flags: dontcopy
Source: Button3.bmp; Flags: dontcopy
Source: "C:\Program Files (x86)\Inno Setup 5\Examples\MyProg.exe"; DestDir: {app}; Flags: ignoreversion; Check: CheckedBox(0)
Source: "C:\Program Files (x86)\Inno Setup 5\Examples\MyProg.chm"; DestDir: {app}; Flags: ignoreversion; Check: CheckedBox(1)

[Code]
var
  Page: TWizardPage;
  ListBox: TNewCheckListBox;
  Memo: TRichEditViewer;
  CheckLabel: TLabel;
  MouseY: integer;
  BitmapImage: TBitmapImage;
  InfoBmp: array of TBitmap;

function CheckedBox(ItemNumber: integer): Boolean;
begin
  Result:= ListBox.Checked[ItemNumber];
end;
procedure CheckOnClick (Sender: TObject);
begin
  if MouseY < ListBox.Items.Count then
    begin
      ListBox.Checked[MouseY]:= Not(ListBox.Checked[MouseY]);
    end;
end;

procedure CheckMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
begin
  MouseY:= Y/ScaleY(16);
  if MouseY < ListBox.Items.Count then
    begin
      Memo.RTFText:= TStrings(ListBox.ItemObject[MouseY]).Text;
      BitmapImage.Bitmap:= InfoBmp[MouseY];
    end;
end;

procedure InitializeWizard();
var
  i: integer;
begin
  ExtractTemporaryFile('Leeme1.rtf');
  ExtractTemporaryFile('Leeme2.rtf');
  ExtractTemporaryFile('Leeme3.rtf');
  ExtractTemporaryFile('Button1.bmp');
  ExtractTemporaryFile('Button2.bmp');
  ExtractTemporaryFile('Button3.bmp');

  Page:=CreateCustomPage(wpWelcome, 'blabla1', 'blabla2, blabla 3')

  ListBox:= TNewCheckListBox.Create(Page);
  with ListBox do
    begin
      Left   := 15
      Top    := 0
      Width  := 200
      Height := 149
      Parent := Page.Surface
      AddCheckBox('blabla', '', 0, True, True, True, True, TStringList.Create);
      AddCheckBox('blabla blabla', '', 1, True, True, False, True, TStringList.Create);
      AddCheckBox('blabla f blabla', '', 1, True, True, False, True, TStringList.Create);

      TStrings(ItemObject[0]).LoadFromFile(ExpandConstant('{tmp}\Leeme1.rtf'));
      TStrings(ItemObject[1]).LoadFromFile(ExpandConstant('{tmp}\Leeme2.rtf'));
      TStrings(ItemObject[2]).LoadFromFile(ExpandConstant('{tmp}\Leeme3.rtf'));
    end;

  Memo:= TRichEditViewer.Create(Page);
  with Memo do
    begin
      Left        := ListBox.Left + ListBox.Width + 8;
      Top         := ListBox.Top;
      Width       := ListBox.Width;
      Height      := ListBox.Height;
      Color       := clBtnFace;
      Enabled     := False;
      BorderStyle := bsNone;
      Parent      := Page.Surface;
    end;

  CheckLabel:= TLabel.Create(Page);
  with CheckLabel do
    begin
      Width       :=ListBox.Width;
      Height      :=ListBox.Height;
      Autosize    :=False;
      Transparent :=True;
      OnMouseMove :=@CheckMouseMove;
      OnClick     :=@CheckOnClick;
      Parent      :=ListBox;
      Cursor      := 1;
    end;

  BitmapImage := TBitmapImage.Create(Page);
  with BitmapImage do
    begin
      AutoSize := True;
      Left        := ListBox.Left;
      Top         := ListBox.Top + ListBox.Height + 8;
      Width       := ListBox.Width;
      Height      := 32;
      Parent := Page.Surface;
    end;

  for i:=0 to ListBox.Items.Count - 1 do
    begin
      SetArrayLength(InfoBmp, i+1);
      InfoBmp[i]:= TBitmap.Create;
    end;
  InfoBmp[0].LoadFromFile(ExpandConstant('{tmp}\Button1.bmp'));
  InfoBmp[1].LoadFromFile(ExpandConstant('{tmp}\Button2.bmp'));
  InfoBmp[2].LoadFromFile(ExpandConstant('{tmp}\Button3.bmp'));
end;