unit ClientHeight;

interface

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

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

var
  Form1: TForm1;

implementation

{$R *.dfm}

// BeginExample: ClientHeight
// Property: Forms.TCustomForm.ClientHeight

// BeginCode
{
This example reduces the height of the form's client area by
half when the user clicks the button on the form:
Note that only the client area is halved, not the entire form.
}
procedure TForm1.Button1Click(Sender: TObject);
begin
  ClientHeight := ClientHeight div 2;
end;
// EndCode
// EndExample: ClientHeight
end.
