unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Touch.GestureMgr;

type
  TForm1 = class(TForm)
    GestureManager1: TGestureManager;
    btn1: TButton;
    procedure FormShow(Sender: TObject);
    procedure FormGesture(Sender: TObject; const EventInfo: TGestureEventInfo;
      var Handled: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormGesture(Sender: TObject;
  const EventInfo: TGestureEventInfo; var Handled: Boolean);
begin
  ShowMessage(Sender.ClassName);
end;

procedure TForm1.FormShow(Sender: TObject);
begin
  btn1.Touch.GestureManager := GestureManager1;
  btn1.Touch.StandardGestures := [sgLeft];
  btn1.OnGesture := FormGesture;
end;

end.