unit Unit1;
 
 
interface
 
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;
 const
  InputBoxMessage = WM_USER + 200;
 
 
type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
  procedure InputBoxSetPasswordChar(var Msg: TMessage); message InputBoxMessage;
    { Private declarations }
  public
    { Public declarations }
  end;
 
 
var
  Form1: TForm1;
 
 
implementation
 
 
{$R *.dfm}
procedure TForm1.InputBoxSetPasswordChar(var Msg: TMessage);
var
  hInputForm, hEdit, hButton: HWND;
begin
  hInputForm := Screen.Forms[0].Handle;
  if (hInputForm <> 0) then
  begin
    hEdit := FindWindowEx(hInputForm, 0, 'TEdit', nil);
    SendMessage(hEdit, EM_SETPASSWORDCHAR, Ord('*'), 0);
  end;
end;
 
 
 
 
procedure TForm1.FormCreate(Sender: TObject);
var
  InputString: string;
begin
  PostMessage(Handle, InputBoxMessage, 0, 0);
  InputString := InputBox('Yeni İnput Box', 'Şifre Giriniz', '');
end;
 
 
end.