[NumLock]

Код:

unit Unit1;

interface

uses
  CommCtrl,
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  StdCtrls;

type
  TForm1 = class(TForm)
    Edit2: TEdit;
    Edit1: TEdit;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

const
  EM_SETCUEBANNER = $1501;

implementation

{$R *.dfm}
{$R WindowsXP.RES}

procedure SetCueBanner(Sender: TWinControl; Banner: String);
var
  buf: array [0..$ff] of Char;
begin
  Banner:=UTF8Encode(Banner+#0);
  Utf8ToUnicode(PWideChar(@buf), PAnsiChar(Banner), Length(Banner));
  SendMessage(Sender.Handle, EM_SETCUEBANNER, 0, Integer(@buf));
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  SetCueBanner(Edit1, 'Введите имя, ога');
end;

initialization
  InitCommonControls;

end.

http://data.cod.ru/90349