Forms Delphi

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;
type
TForm1 = class(TForm)
private
{ Private declarations }
public
procedure WMGetMinMaxInfo( var Message :TWMGetMinMaxInfo ); message WM_GETMINMAXINFO;
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.WMGetMinMaxInfo( var Message :TWMGetMinMaxInfo );
begin
with Message.MinMaxInfo^ do
begin
ptMaxSize.X := 200;
ptMaxSize.Y := 200;
ptMaxPosition.X := 99;
ptMaxPosition.Y := 99;
ptMinTrackSize.X := 100;
ptMinTrackSize.Y := 100;
ptMaxTrackSize.X := 300;
ptMaxTrackSize.Y := 300;
end;
Message.Result := 0;
inherited;
end;
end.