unit UFrmModless;

interface

uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;

type

  TFrmModeless = class(TForm)

    lblInfo: TLabel;

    btnClose: TButton;

    procedure FormClose(Sender: TObject; var Action: TCloseAction);

    procedure FormDestroy(Sender: TObject);

    procedure btnCloseClick(Sender: TObject);

  private

    { Private declarations }

    procedure WMNCHITTEST(var Msg:TWMNCHITTEST);message WM_NCHITTEST;

  public

    { Public declarations }

    procedure CreateParams(var params: TCreateParams); override;

  end;

var

  FrmModeless: TFrmModeless;

implementation

{$R *.dfm}

procedure TFrmModeless.CreateParams(var params: TCreateParams);

begin

    inherited CreateParams(params);

    params.Style := WS_THICKFRAME or WS_POPUP or WS_BORDER;

end;

procedure TFrmModeless.WMNCHITTEST(var Msg: TWMNCHITTEST);

begin

    inherited;

    Msg.Result:=HTCaption;

end;

procedure TFrmModeless.FormClose(Sender: TObject;

  var Action: TCloseAction);

begin

    Action := caFree;

//    FrmModeless := nil;

end;

procedure TFrmModeless.FormDestroy(Sender: TObject);

begin

    FrmModeless := nil;

end;

procedure TFrmModeless.btnCloseClick(Sender: TObject);

begin

    self.Close;

end;

end.