Получить Handle и имя класса окна под мышкой

type 
  TForm1 = class(TForm) 
    Label1: TLabel; 
    Label2: TLabel; 
    Timer1: TTimer; 
    procedure Timer1Timer(Sender: TObject); 
    procedure FormCreate(Sender: TObject); 
  private 
    procedure ShowHwndAndClassName(CrPos: TPoint); 
  public 

end; 

var 
  Form1: TForm1; 

implementation 

{$R *.DFM} 

procedure TForm1.Timer1Timer(Sender: TObject); 
var 
  rPos: TPoint; 
begin 
  if Boolean(GetCursorPos(rPos)) then ShowHwndAndClassName(rPos); 
end; 

procedure TForm1.ShowHwndAndClassName(CrPos: TPoint); 
var 
  hWnd: THandle; 
  aName: array [0..255] of Char; 
begin 
  hWnd := WindowFromPoint(CrPos); 
  Label1.Caption := "Handle :  " + IntToStr(hWnd); 

  if Boolean(GetClassName(hWnd, aName, 256)) then 
    Label2.Caption := "ClassName :  " + string(aName) 
  else 
    Label2.Caption := "ClassName :  not found"; 
end; 

procedure TForm1.FormCreate(Sender: TObject); 
begin 
  Form1.FormStyle := fsStayOnTop; 
  Timer1.Interval := 50; 
end;