unit Fudao_Setup;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Grids, DBGrids, Mask, DBCtrls, ExtCtrls;

type
  TForm4 = class(TForm)
    Button2: TButton;
    DBEdit1: TDBEdit;
    Label1: TLabel;
    DBGrid1: TDBGrid;
    DBNavigator1: TDBNavigator;
    Label2: TLabel;
    procedure Button2Click(Sender: TObject);
    procedure ChangeFonts(OldFormWidth:integer;NewFormWidth:integer);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}
uses
    Data_Unit1;

type
  TFooClass = class(TControl); { needed to get at protected }
                             { font property }
const
ScreenWidth: LongInt = 800; {I designed my form in 800x600 mode.}
ScreenHeight: LongInt = 600;

procedure TForm4.ChangeFonts(OldFormWidth:integer;NewFormWidth:integer);
var
i: integer;
begin
  NewFormWidth := longint(width) * longint(screen.width) div ScreenWidth;
  for i := ControlCount - 1 downto 0 do
    TFooClass(Controls[i]).Font.Size :=
      (NewFormWidth div OldFormWidth) *
      TFooClass(Controls[i]).Font.Size;
end;

procedure TForm4.Button2Click(Sender: TObject);
begin
 Form4.Close;
end;

procedure TForm4.FormCreate(Sender: TObject);
begin
  scaled := true;
  if (screen.width <> ScreenWidth) then
  begin
    height := longint(height) * longint(screen.height) div ScreenHeight;
    width := longint(width) * longint(screen.width) div ScreenWidth;
    scaleBy(screen.width, ScreenWidth);
  end;
  ChangeFonts(ScreenWidth,width);

end;

end.