Показ всплывающих подсказок компонентов

unit Unit1;

interface

uses
  SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls, DB, DBTables, ExtCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
  private { Private-Deklarationen }
  public { Public-Deklarationen }
    procedure DoShowHint(var HintStr: string; var CanShow: Boolean;
      var HintInfo: THintInfo);
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.DoShowHint(var HintStr: string; var CanShow:
  Boolean; var HintInfo: THintInfo);
begin
  with HintInfo do
    if HintControl = Button1 then
    begin
      HintPos.X := Left + Button1.Left;
      HintPos.Y := Top + (Button1.Top);
    end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnShowHint := DoShowHint;
end;

end.