unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    StatusBar1: TStatusBar;
    procedure Button1MouseEnter(Sender: TObject);
    procedure Button1MouseLeave(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1MouseEnter(Sender: TObject);
begin
//--- Display Component Name on the statusbar....
 StatusBar1.SimpleText := (sender as TButton).Name;
end;

procedure TForm1.Button1MouseLeave(Sender: TObject);
begin
//-- Clear the statusbar --
 StatusBar1.SimpleText := '';
end;

end.